Answers
Answer:
The same group; hydrogen.
Explanation:
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.
Hence, valence electrons is same number for all elements in the same group of the periodic table (with the exception of hydrogen).
Hydrogen is the simplest chemical element that exists. The symbol for the chemical element Hydrogen is "H" and it is a colourless, tasteless, odorless, and highly flammable gas.
Hydrogen is a chemical element found in group (1) of the periodic table and as such it has one (1) electrons in its outermost shell. Therefore, Hydrogen has an atomic number of one (1) and a single valence electrons because it has only one proton and one electron in its nucleus.
Based on the octet rule which states that atoms of chemical elements gain, lose or share electrons so as to have eight (8) electrons in their valence shell. Therefore, atoms of chemical elements bond in order to attain the electronic configuration of a noble gas i.e a full valence shell which comprises of eight (8) electrons.
However, the chemical element "Hydrogen" is an exception to the octet rule because it is only able to hold a maximum of two (2) valence electrons in its outermost shell to become full.
Related Questions
6 adaptations of camel
i need simple or short answers
i will mark brainliest for simple and short answer :3
Answers
Answer:
Wide feet for walking in sand.long eyelashes to protect eyes from blowing sand.They can survive a while without food and water.The fat in their humps will break down and give them energy during long trips.They spit when faced with a threat.Long large intestine for absorbing water and food efficiently.Explanation:
Hope this helped!
The 6 adaptations of camel are : long legs, drinks large amount of water, excrete less urine,hump stores fat,padded feet and long eyelashes.
1. Camel have lengthy legs to keep your body out of the hot sand.
2. Camel consumes a lot of water when it is available and then stores it in its body.
3. Camel have much less urine in their excretions, and their dung is dry. None of them perspire. A camel can go for several days without drinking water since it loses very little water.
4. A camel's hump is where fat is stored. The hump functions as a fat or energy reserve in times of need.
5. The camel has padded feet, which are big and flat and make it easier for it to move around on the sand. The padded feet prevent it from sinking into the sand in opposition to the weight of its own body and the load it is carrying.
6. Camel have long eyelashes and hairs to shield their eyes and ears from flying dust particles.
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Trevormc28
What’s 1 trillion to the 10th power
Answers
This number is often expressed in scientific notation as \(1 X 10^{30\).
What is scientific notation?Scientific notation is a method of expressing extremely large or extremely small numbers utilizing powers of ten.
Number is written in scientific notation as a good or service of a coefficient (which must be greater than or equal to 1 and less than 10) and a power of ten.
In scientific notation, the number 1,000 is written as 1 x 1003. The coefficient is one, and the power of ten is three, indicating that the decimal point is moved three places to the right in order to obtain the original number.
Similarly, the number 0.0000023 can be written as 2.3 x 10-6 in scientific notation. The coefficient is 2.3, and the power of ten is -6, indicating that the decimal point must be moved six places to the left in order to obtain the original number.
1 trillion to the tenth power equals 1 followed by 30 zeros, or 1,000,000,000,000,000,000,000,000,000,000,000,000. This figure is frequently expressed in scientific notation as 1 x\(10^{30\).
Thus, this is the 1 trillion to the 10th power.
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What are Bald eagle homologous structures
Answers
The wing of a bald eagle is homologous to the wing of a penguin. Homologous structures are structures that are of similar evolutionary origin.
How do we explain?Homologous structures are described as anatomical features found in different species that have a common evolutionary origin. These structures may have different functions in different organisms, but they share a similar underlying structure and can be traced back to a common ancestor.
The wing of a bald eagle and the wing of a penguin are considered homologous structures because they both evolved from a common ancestral structure, even though they serve different purposes which is flight in the case of the bald eagle and swimming in the case of the penguin.
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Which of the following causes the change from day to night?
Answers
Answer:
^
Explanation:
The Earth orbits the sun once every 365 days and rotates about its axis once every 24 hours. Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. The term 'one day' is determined by the time the Earth takes to rotate once on its axis and includes both day time and night time.
11. A forensic anthropologist noted that a set of skeletal remains exhibited the following traits: wide subpubic angle on the pelvis, a completely fused coronal suture, and a skull with a V-shaped mandible. Which description best supports the skeletal findings? a. The skeletal remains most likely belong to a male over the age of 60. b. The skeletal remains most likely belong to a male under the age of 60. c. The skeletal remains most likely belong to a female over the age of 60. d. The skeletal remains most likely belong to a female under the age of 60.
Answers
The skeletal remains most likely belong to a female over the age of 60. Option C
How do we identify the skeletal remains?The skeletal remains most likely belong to a female over the age of 60.
A wide subpubic angle on the pelvis is a characteristic of female skeletons.
Completely fused coronal suture is an indication of middle age but could differ from person's to person.
A skull with a V-shaped mandible is also more common in females than males. The age of the individual can be estimated from the fusion of the coronal suture, which typically occurs between the ages of 30 and 40.
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you have been tasked to prepare exactly 100 plates of 5% sheep blood mueller hinton agar to run a sensitivity test for a group of fastidious bacteria question .you are aiming precisely 15ml in each of the 100plates.the manufacturers label state dissolve 38g in 1L.How much volume of water is needed to prepare the medium?
Answers
If a 7mm thick plate has been poured, this would affect the size of the inhibition zones, because the inhibition area would be smaller as a greater thickness would require more drugs in the same area.
What is Diffusion Disk?Diffusion Disk is one of the simplest as well as the most reliable and most used susceptibility methods in the microbiology laboratories. Its basic principle has the diffusion of the antimicrobial on the surface of the agar, from a disk impregnated with the same antimicrobial.
This would affect the size of the inhibition zones, because the inhibition area would be smaller as a greater thickness would require more drugs in the same area.
Therefore,Red blood cells are used to make both chocolate agar and sheep blood agar. An enhanced bacterial growth media that promotes growth is blood agar.
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ASAP PLEASE HELPPP!!!!
A scientist wants to use a small plant that can take levels of pollutants, that would
kill other plants, into its body tissues to develop plants that will remove
contaminants from polluted ecosystems. Explain how this research requires an
understanding of genes.
Answers
This research requires an understanding of genes because the ability of a plant to take up and accumulate pollutants is often controlled by specific genes. Scientists can use genetic engineering techniques to identify and manipulate the genes that regulate a plant's ability to absorb and detoxify pollutants.
How this research requires an understanding of genes?Example, scientists may identify a gene that produces a protein that enables a plant to absorb heavy metals from contaminated soil. They can then use genetic engineering techniques to transfer this gene to other plant species, allowing them to also take up heavy metals from the soil.
Furthermore, understanding the mechanisms behind the expression of specific genes can help researchers to identify the most effective plant species and genetic modifications for remediating specific types of pollution. For example, some plants may be better suited for removing organic contaminants from water, while others may be more effective at absorbing heavy metals from soil.
Overall, genetic research plays a critical role in identifying the genes responsible for a plant's ability to take up and accumulate pollutants, and in developing new plant species that can help remediate contaminated ecosystems.
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individuals may give rise to ________ offspring than could possibly ____________.
Answers
Individuals may give rise to more offspring than could possibly survive.
This concept is known as overproduction or reproductive potential. It is a fundamental principle in biology that species tend to produce more offspring than the environment can support.
The reason for this overproduction is rooted in the struggle for limited resources and the survival challenges individuals face in their respective habitats.
By producing a large number of offspring, individuals increase the chances of some offspring surviving and reproducing successfully. This strategy maximizes the species' probability of passing on their genetic traits to future generations.
However, the environment has finite resources, such as food, shelter, and mates, which cannot sustain unlimited population growth.
As a result, only a fraction of the offspring will survive and reach reproductive age. The rest may face competition, predation, disease, or other factors that prevent their successful reproduction.
This overproduction and subsequent natural selection of the fittest individuals contribute to the ongoing process of adaptation and evolution within populations.
Those individuals with advantageous traits are more likely to survive and reproduce, passing on their favorable traits to the next generation.
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Q8. The tips of neuronal axons communicate with other nerve cells by releasing small molecules called neurotransmitters. These neurotransmitters need to
cross a very tiny pocket of fluid to reach the next neuron; the distance is about 0.001 times the length of the smallest axon in this lab. Could this happen
through diffusion?.
Answers
This could happen through diffusion because, as there is a high concentration of neurotransmitters close to the diffusing axon and a low concentration nearer to the receiving neuron.
How does neurotransmitters travel through axons?The synapse that connects the following neuron's axon and dendrite allows neurotransmitters to pass through. Neurotransmitters adhere to the dendrite's membrane. The binding permits passage of the nerve impulse through the receiving neuron.
When neurotransmitters are being released from the presynaptic cell, their concentration is at their peak. The neurotransmitter can easily diffuse across this small distance to the postsynaptic neuron because the synaptic gap between the presynaptic neuron and postsynaptic neuron is so small.
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What is the membrane potential (Vm) of a cell with 20 open K+ channels and 40 open Na+ channels. Assume EK is -85 mV and ENa is +30 mV.
Answers
The membrane potential (Vm) of the cell with 20 open K⁺ channels and 40 open Na+ channels is approximately -27.5 mV.
The membrane potential (Vm) of a cell is determined by the balance between the concentration gradients and the ion channels that control the flow of ions across the membrane. To calculate the Vm, we can use the Goldman equation, which takes into account the permeability of the membrane to each ion species and the equilibrium potentials for each ion species:
Vm = (PNa × ENa + PK × EK) / (PNa + PK)
Where Vm is the membrane potential, ENa is the equilibrium potential for Na⁺ ions (+30 mV), EK is the equilibrium potential for K⁺ ions (-85 mV), and PNa and PK are the relative permeabilities of the membrane to Na+ and K⁺ ions, respectively.
Since the number of open Na⁺ channels (40) and K⁺ channels (20) determines the relative permeabilities, we can assume that PK/PNa = 20/40 = 0.5.
Substituting the values into the Goldman equation, we get:
Vm = (0.5 × ENa + 0.5 × EK) / (0.5 + 0.5) = (0.5 × 30 + 0.5 × (-85)) / 1 = (-27.5) / 1 = -27.5 mV
Therefore, the membrane potential (Vm) of the cell with 20 open K⁺ channels and 40 open Na⁺ channels is approximately -27.5 mV.
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Examine the diagram of the nitrogen cycle.
Which option best describes what's happening in the part
labeled 3?
Ammonia, nitrates, and other compounds dissolve in
water and are carried to the oceans.
Human activities add nitrates and other compounds
to Earth's systems.
O Nitrogen is stored in the largest reservoir on Earth.
Nitrogen-fixing bacteria convert nitrogen gas into
compounds usable by plants and animals.
Answers
The part labelled 3 shows nitrogen is stored in the largest reservoir on Earth.
What is the nitrogen cycle?The transformation and cycling of nitrogen in various forms throughout ecosystems is referred to as the nitrogen cycle, a biogeochemical process. The nitrogen cycle involves the transformation of nitrogen between various chemical forms so that it is available for use by plants and other creatures.
Nitrogen is a crucial element for the growth and development of living beings.
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types of electrophoresis
Answers
Answer:
Electrophoresis is a technique used to separate molecules based on size and charge. There are several types of electrophoresis, including agarose gel electrophoresis, capillary electrophoresis, two-dimensional electrophoresis, and isoelectric focusing.
Explanation:
A good web is represented in the diagram below. If the fish population decreases what is the most direct effect this will have on the aquatic ecosystem
Answers
Answer:3
Explanation:
Assignment: 04.02 The Biosphere
In this lesson, you took a tour of three of our unique aquatic biomes. In this assessment, you will take a virtual field trip to any aquatic ecosystem of your choice and learn about the biotic and abiotic factors that shape it.
A virtual field trip is a Web search of a location you are unable to visit in person. For this virtual trip, pick any sea, lake, bay, or river in the world and research the biotic and abiotic factors that make it unique. Include the following features in your virtual field trip research:
1. the location of your body of water
2. a description of the geography surrounding your body of water
3. the effects of sunlight on the aquatic life inhabiting your body of water
4. the depths and salinity of your body of water and how this shapes the types of aquatic life present
5. the effects of seasonal changes to water temperatures and aquatic life in your body of water
6. predictions or current research on the effects of climate change to your body of water
Once, you’ve gathered your research, share your virtual field trip with us. Include pictures of your aquatic ecosystem and the life within it in your presentation, but make sure to cite the sources of your pictures and research. Please review the student example and rubric for this virtual field trip before continuing.
You may share your field trip in any creative format you would like. Here are a few suggestions:
- video or media presentation
- slide show
- Web page
- illustration that includes research notes If you need would like an assessment outline
Answers
The ocean is categorized by several areas or zones (Figure 44.21 (Links to an external site.)). All of the ocean’s open water is referred to as the pelagic realm (or zone). The benthic realm (or zone) extends along the ocean bottom from the shoreline to the deepest parts of the ocean floor. Within the pelagic realm is the photic zone, which is the portion of the ocean that light can penetrate (approximately 200 m or 650 ft). At depths greater than 200 m, light cannot penetrate; thus, this is referred to as the aphotic zone. The majority of the ocean is aphotic and lacks sufficient light for photosynthesis.
GATTACA
The nucleotide base sequence that complements the section of DNA modeled above is?
Answers
Answer:
CTAATGT
Explanation:
C to G
G to C
A to T
T to A
The most fundamental understanding of a gene or genome is its nucleotide sequence.Therefore, the complementing sequence would be CTAATGT.
What do you understand by nucleotide sequence ?The order of the nucleotides composing the alleles within a DNA or RNA molecule is indicated by a series of bases denoted by a set of five different letters, which is known as a nucleic acid sequence. Sequences are often presented according to convention from the 5' end to the 3' end. The sense strand is used for DNA.
Complementary sequence refers to a sequence of bases in a nucleic acid that can create a double-stranded structure by matching base pairs. Adenine and thymine form a double bond, while guanine and cytosine form a triple bond. As a result, adenine and thymine and cytosine and guanine are complimentary base pairs. The DNA strand 5' ATCGAACGT 3' has a complimentary sequence of 3' TAGCTTGCA 5'.
Therefore, the nucleotide base sequence hat complements the section of DNA modeled above is CTAATGT.
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1) why did the researchers want to study wildlife in the urban Cleveland area? [1pt]
2) What is species richness? [1pt]
3) What is species evenness? [1pt]
4) using the diagrams below Does Park A & Park B have the same level of biodiversity? Explain your
thinking. [1pt]
![1) why did the researchers want to study wildlife in the urban Cleveland area? [1pt]2) What is species](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/jpfP3AIZkcmRrvs7lXlbBK6DAvnya3Ds.png)
Answers
The Cleveland Metroparks is an amazing and distinctive urban environment that is ideal for researching the ecology of animal communities and interactions between people and nature in cities.
Urban ecology is a relatively new and underdeveloped field of research that addresses these problems despite the speeding up of urbanization and the effects it has on both natural systems and how people perceive nature. Because of this, almost all ecological theory pertaining to animal populations has been developed in natural, rural, or non-urbanized situations.
Over 23,000 acres of natural habitat, including meandering rivers, breathtaking waterfalls, and miles and miles of forest, make up the 18 parks that make up the Metroparks. The Metroparks are home to numerous different species, including deer, coyotes, foxes, raccoons, and more.
In addition, the parks are home to a staggering variety of plants and hundreds of bird species, and they attract millions of people who want to get closer to nature.
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The food web models a community along the coast of Alaska. Which
organism in the food web is an herbivore?
A Sea otter
B. Phytoplankton
C. Seagull
D. Rock ptarmigan
Answers
Answer:
its d. rock ptarmigan
i just did the pretest plus looked it up!!!!
Bacteria that can live in extreme environments.
thermophiles
halophiles
methanogen
all of the above
Answers
Identify the cellular structure that assembles an organic molecule
Answers
Ribosomes are cellular organelles responsible for the synthesis of proteins from amino acids. The process of protein synthesis involves the assembly of amino acids into long chains, which then fold into the three-dimensional structures that define their function. Ribosomes facilitate this process by reading the genetic instructions encoded in mRNA molecules and using that information to assemble the appropriate sequence of amino acids into a polypeptide chain.
What is a niche?
A- an organism’s ability to interbreed with other organisms
B- an organism’s ability to reproduce asexually and produce organisms identical to itself
C- an organism’s living and nonliving interactions with its environment
Answers
hi <3
the correct option would be option C
hope this helps :)
Answer:
C
Explanation:
Source: Trust me bro.
Honesty I heard it every day in biology classes for 2 years.
Which graph represents selection that may lead to reduced variation in a population?
A graph has trait value on the horizontal axis and population of individuals on the vertical axis. The original population and population after selection have similar curves, but the original population peaks before the population after selection.
A graph has trait value on the horizontal axis and population of individuals on the vertical axis. The population after selection increases, decreases, increases, and then decreases again. The original population increases at the point that the original population drops.
A graph has trait value on the horizontal axis and population of individuals on the vertical axis. The original population peaks at the same time as the population after selection but the population after selection peaks higher and at a more rapid speed.
A graph has trait value on the horizontal axis and proportion of individuals on the vertical axis. The original population and population after selection have similar curves but the original population is slightly higher at all points.
Answers
Answer:
A graph has trait value on the horizontal axis and population of ... selection have similar curves, but the original population peaks
Answer: graph B
Explanation: :)
refer to the metabolic pathway illustrated. if i, ii, iii, and iv are all required for growth, a bacterial strain that does not make enzyme x would be able to grow on medium supplemented with which of the following nutrient(s)?
Answers
A bacterial strain that does not produce the enzyme X would be able to grow on medium that has been supplied. Nutrients II, III, and IV are all necessary for growth.
What do a tRNA's two functional ends look like?The tRNA is 3'-UAC-5' on one end and binds to an mRNA codon that is 5'-AUG-3' on the other end through complementary base pairing. The amino acid methionine, which is the one the mRNA codon AUG specifies, is carried by the opposite end of the tRNA.
What is the appropriate information flow during gene expression?As a result, information moves from DNA to RNA to protein during the expression of a gene that codes for proteins. The main tenet of molecular biology is that information flows in one direction.
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2. Under acidic conditions, bicarbonate acts as a buffer in seawater by bonding to additional
ions, increasing the pH of the ocean.
O A. hydroxide
O B. carbonate
C. carbon dioxide
D. hydrogen
Answers
Answer:
B.
Explanation:
The rise in the acids levels of the sea water is caused by the dissolve of CO2 in sea water which lowers the pH.The resultant unstable compound(weak acid) formed is H2CO3.The latter dissociates to for HCO3 + CO3- These reversible products are the buffers in the seawater that resists the fluctuation in the pH. The carbonate ions reacts with the high concentrations of Ca + in the sea water, to form the exoskeleton s of some fauna.e.g.,Mussels.
Please tell me how does water flow through sponges in order
Answers
Answer:
Small and tube shaped, water enters the sponge through dermal pores and flows into the atrium. Choanocyte flagella create the current to expel it through a single osculum. Note that water enters the sponge through a modified cell known as a porocyte.
Explanation:
Hope this helped, Have a Wonderful Day!!
Use the word list at the beginning of the unit to help complete the summary paragraph below. All organisms are made up of __________, the smallest units of life. A _________________ organism may only contain one cell! There are 2 types of __________________, sexual and __________. An organism needs ____________ and a constant supply of materials to do any type of cellular work such as metabolism. As food is used up, it must be replaced in order for the cell to ___________, create more energy and repair itself. ___________________ is a term used for all of the chemical reactions that occur within the cell and the organism. Key to the cell’s survival is its ability to maintain stable internal conditions. This important characteristic of life is called _______________.
Answers
Answer:
Explanation:
asexual
why bone grow in bidirectional
Answers
Explanation:
Bones grow in different directions because they need to support the body in different ways. The different directions allow for flexibility and strength.
Which graph below best represents the relationship between the relative number of nuclei, genes, and chromosomes in a typical human cell?
A)
B)
C)
D)
The cells in the diagram below were present in the same individual.
Skin
• Muscle
Nerve
These cells are most similar in the
A) amount of energy they release
B) type of proteins they synthesize
C) rate of their metabolism
D) information stored in their DNA
4. The diagram below represents the organization of structures within an organism.
Which term best indicates the structures represented by the circle labeled X?
A) organelles
B) chromosomes
C) organ systems
D) tissues
Answers
The correct graph representing the relationship between the relative number of nuclei, genes, and chromosomes in a typical human cell would be graph C.
The cells (skin, muscle, nerve) are most similar in the B. type of proteins they synthesize, as protein synthesis is a fundamental process carried out by all cells to perform their specific functions.
The term that best indicates the structures represented by the circle labeled X in the diagram is A. organelles, which are specialized compartments within cells that perform specific functions to support cellular processes.
The graph that best represents the relationship between the relative number of nuclei, genes, and chromosomes in a typical human cell is graph C. In this graph, the number of nuclei, genes, and chromosomes increases together in a linear manner, indicating a consistent relationship between these components.
The cells in the diagram (skin, muscle, nerve) are most similar in the type of proteins they synthesize. While these cell types have different functions and characteristics, they all share the basic machinery for protein synthesis, which is essential for their respective functions.
The structures represented by the circle labeled X in the diagram are organelles. Organelles are specialized structures within cells that perform specific functions. They are typically membrane-bound and carry out various cellular processes such as energy production, protein synthesis, and waste removal. Examples of organelles include mitochondria, endoplasmic reticulum, and Golgi apparatus.
It is important to note that the specific context and details of the diagrams would be helpful for providing a more accurate explanation.
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1. For any type of rock to become sedimentary rock, what must first happen
The rock must chemically change.
The rock must be erupted from a volcano.
The must be eroded into sediment.
ebo...
The rock must melt in the Earth's interior.
Answers
Answer:
The rock must be eroded into sediment
Explanation:
In order to form sedimentary rock, the accumulated sediment must become compacted and cemented together.
For any type of rock to become sedimentary rock, the rocks must first be eroded into sediment. Thus, the correct option is C.
What are the sedimentary rocks?Sedimentary rocks are the types of rock which are formed by the accumulation or deposition of different minerals or organic particles at the Earth's surface, followed by cementation. Sedimentation include all the processes that cause these particles to settle in place.
Clastic sedimentary rocks form from the accumulation and lithification of the mechanical weathering debris on the Earth's surface. Examples of sedimentary rocks include breccia, conglomerate, sandstone, siltstone, and shale.
Therefore, the correct option is C.
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Explain the following statement using evidence from the DNA sequences:
Mutations in the DNA change how proteins are made which leads to new and different forms of phenotypes.
Answers
A missense mutation is a Genetic alteration that causes the protein produced to encode a different amino acid at a specific location. Certain missense mutations change how the resulting protein functions.
Why do some changes in an organism's DNA sequence cause change, while others do not?While mutations always result in a change in the DNA sequence, they do not necessarily have a noticeable impact on the organism or alter the resulting protein. Since most amino acids can be encoded by two or more distinct codons, this is possible.
Can mutations be found using DNA sequencing?The ability to properly identify and characterise the majority of sequence changes makes direct DNA sequencing, in theory, the method for mutation identification with the highest degree of accuracy.
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What is Hypothesis Driven Research?