Answer:
Robert Hooke
Explanation:
With continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, known as cell biology. Over a century later, many debates about cells began amongst scientists. Most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1839. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory. It was an important step in the movement away from spontaneous generation
Answer:
the answer is ROBERT HOOKEDrag the tiles to the correct boxes to complete the pairs. Match each scenario to the energy transformation it represents. a ball dropped from a height sunlight falling on solar panels a person talking into a microphone sound energy to electric energy arrowRight radiant energy to electric energy arrowRight gravitational potential energy to motion energy arrowRight
Answer: Please see answers in explanation column
Explanation:
According to the Law of Conservation of Energy, Energy CANNOT be created or destroyed, but it can transform or change from one form to another.
We can therefore say that
---a ball dropped from a height changes from --- gravitational potential energy to motion energy.
---sunlight falling on solar panels changes from ---radiant energy to electric energy.
--- a person talking into a microphone changes from--sound energy to electric energy.
Answer:
Answer below:
Explanation:
sound energy to electric energy---> a person talking into a microphone
radiant energy to electric energy---> sunlight falling on solar panels
gravitational potential energy to motion energy---> a ball dropped
from a height
A study was conducted to determine if smoking cigars is associated with tongue cancer. Of the 500 individuals with tongue cancer, 450 were cigar smokers; of the 1,000 without tongue cancer, 450 were cigar smokers.
a) Create a 2x2 table
b) How many people smoked cigars and did not have tongue cancer?
c) How many people did not smoke cigars and did not have tongue cancer?
d) Calculate the odds ratio
E) Interpret the odds ratio
a) The 2x2 table for the study:
Tongue Cancer No Tongue Cancer
Cigar Smokers 450 450
Non-Smokers 50 550
b) Number of people who smoked cigars and did not have tongue cancer: 450.
c) Number of people who did not smoke cigars and did not have tongue cancer: 550.
d) The odds ratio is 11.
e) Interpretation: Cigar smokers are 11 times more likely to develop tongue cancer compared to non-smokers.
a) The 2x2 table for the study is as follows:
Tongue Cancer No Tongue Cancer
Cigar Smokers 450 450
Non-Smokers 50 550
b) The number of people who smoked cigars and did not have tongue cancer is 450.
c) The number of people who did not smoke cigars and did not have tongue cancer is 550.
d) To calculate the odds ratio, we use the formula: (ad)/(bc), where a is the number of cigar smokers with tongue cancer, b is the number of non-smokers with tongue cancer, c is the number of cigar smokers without tongue cancer, and d is the number of non-smokers without tongue cancer. In this case, the odds ratio is:
(450 * 550) / (50 * 450) = 550 / 50 = 11
e) The odds ratio of 11 indicates that individuals who smoke cigars are 11 times more likely to develop tongue cancer compared to those who do not smoke cigars. This suggests a strong association between cigar smoking and tongue cancer. It is important to note that the odds ratio only indicates the strength of association and does not establish causation. Other factors, such as lifestyle, genetics, and other smoking habits, may also contribute to the development of tongue cancer. Further research and analysis would be required to determine the causal relationship between cigar smoking and tongue cancer.
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you're studying a population of an endangered wildcat in india. this population has been hunted aggressively, but there was also a rumor that the remaining ones are heavily inbred. you sample all 500 remaining cats to look for evidence of inbreeding and get the following genotypes: aa: 31, aa: 188, aa: 281 what do you conclude?
We conclude that the cats are not detectably inbred when studying about the population of an endangered wildcat in India.
Signs of immoderate inbreeding encompass ordinary small clutter sizes (one or kittens), crooked noses, misaligned jaws, extraordinary eye set and asymmetry. Male and ladies might also additionally revel in low fertility and most cancers is greater not unusualplace in more youthful cats.
Inbreeding is the mating collectively of intently associated cats, as an instance mother/son, father/daughter, sibling/sibling matings and half-sibling/half-sibling. It is the pairing of animals which might be greater intently associated than the common population.
In the wild, there'll constantly be a few diploma of inbreeding when you consider that cats will obviously breed with their near loved ones if they arrive into touch with every different while the girl is in heat. Therefore, a few diploma of inbreeding is natural.
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How do characteristics properties help you determine whether a chemical change or a physical change has occurred.
Answer:
Chemical changes usually involve the production of energy (which can be in the form of heat, light, sound, etc.) In a physical change, no new substance is formed. A chemical change is always accompanied by one or more new substance(s). Physical change is easily reversible i.e original substance can be recovered.
Match the human activity to its correct consequence for marine ecosystems.
A. drill for oil ---- coral bleaching
B. fertilizer use ---- ocean acidification
C. fishing with dynamite ---- algal blooms
D. release of ballast water from ships ---- introduction of invasive species
E. None of the above human activities is matched to its correct consequence for marine ecosystems.
None of the human activities listed in options A to D are correctly matched with their corresponding consequences for marine ecosystems.
Drill for oil: The consequence of oil drilling in marine ecosystems can include oil spills, which can have severe impacts on marine life, including contamination of water, harming marine species, and disrupting habitats. It does not directly cause coral bleaching. Fertilizer use: Excessive fertilizer use on land can contribute to nutrient runoff into water bodies, leading to eutrophication. This excess nutrient input can cause algal blooms and dead zones, but it does not directly cause ocean acidification.
Fishing with dynamite: The consequence of fishing with dynamite is not specifically associated with algal blooms. Instead, it leads to widespread destruction of coral reefs and habitats, depletion of fish populations, and damage to marine ecosystems. Release of ballast water from ships: The consequence of releasing ballast water from ships is the potential introduction and spread of invasive species. Ballast water can carry non-native species that can establish themselves in new environments, outcompete native species, and disrupt ecosystems.
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What provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased?
ts fossil records but i need an explination
Answer:
Fossil records provide evidence of an increase in animal species at the same time that atmospheric oxygen levels increased.
Explanation:
A huge diversification among animal species occurred with the increase in the levels of atmospheric oxygen. The reason why the number of species increased drastically was that a whole new world opened up, the land. The land was open for exploitation and taking over, with every single niche free, so animals diversified and filled in pretty much all of the niches. The fossil records give us clues when this happened, as from only microorganisms there is a sharp rise in complex animals, coinciding with the increase of oxygen levels.
If it wasn't for the increase of atmospheric oxygen though this wouldn't have been possible. The oxygen in the atmosphere enabled animals to breathe on land. Also, it cooled off the global temperatures which were too high before the increase of atmospheric oxygen, making them suitable for life. And last but not least, the atmospheric oxygen resulted in the formation of the ozone layer, a layer that started to act as protection from the UV rays.
Answer:fossil record
Explanation:
What do scientists use to refer to organisms because common names can create confusion? *
Answer:
Scientific Name
Explanation:
Scientists use a two-namesystem called a Binomial Naming System.
They name animals and plants using the system that describes the genus and species of the organism.
Forming lons and lonic Bonds
2. When an atom takes on electrons, it will have which of the following?
O a negative overall charge
no charge
a positive overall charge
a neutral charge
Answer:
a negative charge overall
Explanation:
when an atom loses electrons, because the protons are more than the electrons now, the atom becomes positive
when an atom gains electrons, because the number of electrons is more than the protons, the atom has a negative charge
the punnett square on p. 70 of your lab manual shows the genotypes of two parents for trait r. use this punnett square to answer the questions in this exercise. trait r is the mendelian trait in humans for tongue rolling. the allele for the ability to roll the tongue (r) is dominant over the allele for the inability to roll the tongue (r). what is the mother's genotype? group of answer choices
The genotypes of two parents for trait r is the mendelian trait in humans for tongue rolling. the allele for the ability to roll the tongue (r) is dominant over the allele for the inability to roll the tongue (r). The mother's genotype The mother is heterozygous (Rr) for the tongue-rolling trait.
There are two main types of genotypes that is homozygous and heterozygous. If an organism is homozygous for a gene, referred that they inherit two of the same versions of the gene. If an organism has a heterozygous genotype, referred that they inherit two different versions of a gene.
Genotype referred to the genetic makeup of an organism which described about an organism's complete set of genes. It is used to refer to the variant forms of a genes that are carried by an organism. The ability to roll the tongue is dominant over the allele for the inability to roll the tongue.
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which scientist concluded that all living organisms are made of cells?
The discovery that all living organisms are made of cells is credited to the German biologist Matthias Jakob Schleiden and the German physiologist Theodor Schwann.
In the mid-19th century, Schleiden concluded that all plants are composed of cells based on his observations of plant tissues under a microscope. Schwann later extended this idea to animals, stating that all animals, including humans, are also composed of cells. This marked the beginning of the cell theory, which states that all living things are composed of cells, cells are the basic unit of life, and new cells are produced from existing cells.
The cell theory was further developed and refined over the years, with the contribution of other scientists such as Rudolf Virchow, who proposed that all cells come from pre-existing cells, a concept known as biogenesis. The cell theory revolutionized biology by providing a basic framework for understanding the structure and function of living organisms and paved the way for further discovery and advancements in the field of biology. Today, the cell theory remains one of the central tenets of modern biologist and is considered one of the most important discoveries in the history of science.
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HOW
TO
PROJECT: BUILDING DNA
The structure of DNA resembles a twisted ladder called a double helix. For this project, you will build a DNA molecule by
placing its basic parts together like pieces of a puzzle.
The structure of DNA resembles a twisted ladder because both strands are linked by hydrogen bonds.
What is DNA?Deoxyribonucleic acid (DNA) is a double helix composed of two long chains of nucleotides linked by hydrogen bonds.
In DNA there exist only four different types of nucleotides (i.e., Guanine, Cytosine, Thymine and Adenine).
In conclusion, the structure of DNA resembles a twisted ladder because both strands are linked by hydrogen bonds.
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which accessory gland is important in male reproduction
Answer:
Prostate
The prostate is one of the male accessory glands that contributes to the male ejaculate by producing seminal fluid.
Answer:
prostate
Explanation:
might be wrong tho ynk
which level of organization includes all the other levels of organization
Answer:
the organism level
Explanation:
The level of organization that includes all other levels of organization is the organism level. More Explanation The human body is organized at different levels starting from the cell followed by the tissue organ system and finally the complete organism.
Answer:
the organism level.
Explanation:
above.
What is photosynthesis and cellular respiration reactants
The products and reactants for photosynthesis are reversed in cellular respiration: The reactants of photosynthesis are carbon dioxide and water, which are the products of cellular respiration. The reactants of cellular respiration are oxygen and sugar, which are the products of photosynthesis.
HELPPPPP
how could changing one mRNA codon change a protein?
Answer:
the outcome of a frame shift mutation is complete alteration of the amino acid sequence of a protein. This alteration occurs during translation because ribosomes read the mRNA strand in terms of condons,or groups of three nucleotides. theses groups are called the reading frame.
Explanation:
hope that helps.:)
Changing one mRNA codon will change a protein because each protein
have their specific mRNA codons.
The mRNA codon are translated into a single amino acid during polypeptide
formation. Changing one mRNA codon will result in the formation of a
different type of protein.
The mRNA codon comprises of three base pairs and a change in an amino
acid such as Alanine which has a codon of GCA which when replaced by
GAC will form aspartic acid.
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An anaerobic step in cellular respiration, before the cell decides if it will go through fermentation or the
Krebs Cycle and ETC
Answer: Glycolysis. Hope it‘s the right answer.
Hi can someone please correct me.
What are our lungs made out of?
Answer:
The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax). The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi. The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopies
Explanation:
Which statement describes a benefit of desalination technology?
A. The salty residue of desalination can create dead spots.
B. The desalination process converts ocean water to freshwater.
C. Desalination plants are expensive to build and maintain.
D. The desalination process uses a lot of energy.
Answer:
B is the correct answer
Desalination is the removal of salt from the water effluents. It is beneficial to use as it converts ocean water into freshwater.
What is the Desalination method?Desalination is a method that eliminates salt and other excessive minerals from the brackish or the seawater effluent. The salinity of the oceans and seas can be removed by treating them with the process.
The conversion of the saline water from oceans into freshwater will increase the availability of fresh water that can be consumed and used for various purposes.
The process of desalination includes reverse osmosis and distillation that converts the saline water into fresh water.
Therefore, option B. desalination converts ocean water into fresh water.
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A pea plant of Rr Yy is testcrossed. What are the phenotypic and the genotypic ratios in the offspring of this cross?
A. 1:1:1:1 for both the phenotypic and genotypic ratios
B. 9:3:3:1 for the phenotypic ratio and 1:2:1 for the genotypic ratio
C. 3:1 for the phenotypic ratio and 1:2:1 for the genotypic ratio
D. 2:1:1 for the phenotypic ratio and 1:1 for the genotypic ratio
E. 3:1 for the phenotypic ratio and 1:1 for the genotypic ratio
The phenotypic and the genotypic ratios in the offspring of this cross are 3:1 for the phenotypic ratio and 1:1 for the genotypic ratio when a pea plant of Rr Yy is testcrossed. The correct option is E.
The phenotypic and genotypic ratios of the offspring of a cross between a pea plant of Rr Yy and rr yy can be determined by using a Punnett square. The R and r genes control seed shape, and the Y and y genes control seed color. The phenotype and genotype of the offspring are the two most important things to consider.
In this case, the ratio is 3:1 because three of the four possibilities (RY, Ry, rY) will result in the dominant phenotype, while only one possibility (ry) will result in the recessive phenotype. The genotypic ratio is 1:1 because half of the offspring will have the dominant allele for both genes (RY or rY), while the other half will have one dominant and one recessive allele (Ry or ry). This results in a ratio of 1:1. The correct option is E.
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During the past 200 years, absorbed somewhere between one-third and one-half of the carbon dioxide released into the atmosphere by fossil fuel burning. Carbon dioxide dissolves in seawater and combines with to form carbonic acid. Increasing amounts of carbonic acid in the seawater lower the pH by increasing the concentration of hydrogen ions. As the water becomes more , the hard, calcium-containing shells formed by many organisms—such as shellfish and corals—erode away. If ocean acidification continues, shellfish species that provide food for many other animals (including humans) may go extinct, and entire coral reefs, including the Great Barrier Reef in Australia, may disappear.
Answer:
The correct answer would be -
1. the ocean have
2. water
3. acidic.
Explanation:
Carbon dioxide fro the atmosphere dissolves in the seawater naturally. This process can be understood by the following process:
Water and carbon dioxide reacts to form carbonic acid that can dissociate into either carbonate ion or bicarbonate ion:
1. CO2 + H2O ====> H2CO3⁻ (carbonic acid)
2. H2CO3⁻ ======> H⁺ + HCO3⁻ (bicarbonate ion)
3. H2CO3⁻ ======> 2H⁺ + CO3⁻ (carbonate ion)
Due to the presence of proton ions in seawater, seawater becomes more acidic. As hydrogen ions bind to the carbonate ions to make bicarbonate ions, the carbonate ion reduced which is required to form the
When the body is cold,an interaction of systems allows the body to warm itself up.which of these help the body to warm itself up
Answer:
The correct answers are: Shivering goosebumbs forming, hair on body standing up
In pea plants, tall plants (T) are dominant to short plants (t). If two heterozygous (Tt) individuals are crossed, what percent of their offspring have the probability of being short?
Answer:
1
Explanation:
T t
T TT Tt
t Tt tt
Amino acids in polypeptides are joined by what type of bond?
a. hydrogen
b. peptide
c. covalent
Answer:
B
Explanation:
i hope this helps you
i hope this helps you
Fill in the blank question. The initial effect of a stimulus on a sensory receptor is a small, local change in membrane potential called a(n)
Answer:
The initial effect of a stimulus on a sensory receptor is a small, local change in membrane potential called a(n) receptor potential.
Explanation:
The process used by sensory receptors to transform the physical energy of the sensory stimulus into action potentials, the fundamental unit of information in the nervous system, is called sensory transduction. The entrance of positive charges towards the interior (mainly Na +), will cause a depolarization; while if there is an exit of positive charges from the interior (mainly K +) then hyperpolarization will occur. This change in membrane potential is called the receptor potential. A receptor potential is then a local potential that can sometimes represent the only response that results from the transduction process, for example in the taste sensory cell.
1. Scientists cannot perform an experiment without first asking questions about the things they observe around them. What was the question Redi wanted to answer?
Answer:
A scientific investigation is a plan for asking questions and testing possible answers. A scientific investigation typically begins with observations. Observations often lead to questions. A hypothesis is a possible logical answer to a scientific question, based on scientific knowledge.
Explanation:
The process of science involves asking a question and then forming testable hypotheses in order to gather evidence either to support or to refute it. So-called "cherry picking" of evidence to support an idea and ignoring evidence that may refute it does not advance knowledge and is not the scientific method.
Hoped this helped! :D
I wanted to understand how the performance of the packed bed
changes with exhaust gas temperature and flow rate. What would you
add to characterize the bed performance?
Please send me a reference for
To characterize the performance of a packed bed, parameters such as pressure drop, pollutant removal efficiency, bed saturation and breakthrough, residence time, and adsorption capacity should be considered. These factors provide insights into the bed's efficiency, pollutant capture, and operational optimization.
To characterize the performance of a packed bed, in addition to exhaust gas temperature and flow rate, several parameters can be considered:
1. Pressure drop: The pressure drop across the packed bed is an important indicator of its performance. It is influenced by factors such as bed height, particle size, and gas velocity. A higher pressure drop may indicate a greater contact between the gas and the bed particles, promoting better pollutant removal efficiency.
2. Pollutant removal efficiency: The effectiveness of the packed bed in removing pollutants from the exhaust gas stream is a crucial performance parameter. It can be evaluated by measuring the concentration of pollutants at the inlet and outlet of the bed. Higher removal efficiency signifies better performance.
3. Bed saturation and breakthrough: Saturation occurs when the bed's pollutant adsorption capacity is reached, leading to breakthrough or the release of pollutants into the outlet gas stream. Monitoring breakthrough is essential to determine the bed's lifespan and when it requires regeneration or replacement.
4. Residence time: The average time the gas spends within the packed bed is known as the residence time. It is influenced by bed dimensions and gas flow rate. A longer residence time allows for more contact between the gas and the adsorbent, potentially improving pollutant removal.
5. Adsorption capacity: The bed's adsorption capacity refers to its ability to capture and retain pollutants. It depends on factors such as adsorbent type, surface area, and porosity. Higher adsorption capacity implies a greater potential for pollutant removal.
By considering these additional parameters along with exhaust gas temperature and flow rate, a comprehensive characterization of the packed bed's performance can be obtained. This information can guide the optimization of operating conditions, selection of suitable adsorbents, and design of effective pollution control systems.
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Which of the following groups of nutrient-containing compounds require some transmembrane transport process to pass across phospholipid bilayer membranes of root hair cells? O2, N2, CO2 water K . Na*, NO3 CO2 and H20 all of the above Which of the following is an accurate reason for nutritional adaptations? Plants can't always do enough photosynthesis so need help from symbionts plants can't always get enough CO2 so need nutritional adaptations plants can't always get enough macronutrients from soil so need nutritional adaptations plants can't always get enough micronutrients from soil so need nutritional adaptations Plants need associations with pathogenic fungi in order to stimulate them to produce secondary compounds
Sodium and potassium require certain transmembrane transport process to pass across the phospholipid bilayer membrane in root hair cells.
Plants cannot always get enough macronutrients from soil, and thus need nutritional adaptations.
Nitrogen is an important macromolecule required by plants for their normal functioning and growth. However, plants do not have the necessary mechanisms for the utilization of atmospheric nitrogen.
Thus, plants have adapted the symbiotic relationship with microbes and fungi through the formation of legumes and mycorrhizae for fulfilment of their need of nitrogen.
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A simple diagram of a DNA molecule is shown below. Which of the following is represented by X?
(photo above)
Answer:
From the diagram X = base pairs
Explanation:
Genetic information stored within DNA is used for growth, reproduction, and cell repair. DNA, deoxyribonucleic acids, are long-chain, helical macromolecules made of specific sequences of covalently bonded monomers called nucleotides.
Nucleotides comprise:
a 5-Carbon deoxyribose sugar, one nitrogenous base (adenine, guanine thymine, and cytosine) and a phosphate group.Nitrogenous bases cause nucleotides to form hydrogen bonds with other nucleotides as base-pairs. The four types of bases each make the nucleotides Thymine and Cytosine (pyrimidine bases) along with Guanine, and Adenine, (purine bases). In base-pair formation, Adenine forms double bonds with Thymine, and cytosine forms triple bonds with guanine.
Characteristic physical properties are properties that are independent of the size of the
sample substance. The measure of a characteristic physical property will remain the
same regardless of the amount of matter sampled. Which of the following properties is
not a characteristic physical property of matter?
A. Mass
B. Density
C. Thermal conductivity
D. Boiling point
Thermal conductivity is not a characteristic physical property of matter. So, the correct option is (C).
What is Physical Property?A physical property is defined as a property which is measurable, whose value describes the state of a physical system. There can be changes in the physical properties of a system that are used to describe its transitions between transient states.
Physical properties also known as observables which are not modal properties. It's measurement can change the arrangement of matter in a sample but not the structure of its molecules. A physical property involves a physical change but not a chemical change.
Examples of physical properties include mass, density, color, boiling point, temperature, and volume.
Thus, Thermal conductivity is not a characteristic physical property of matter. So, the correct option is (C).
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