On the Galapagos Islands, Darwin observed tortoises with domed and saddle-shaped shells. How did Darwin's observations of these tortoises help him form the theory of evolution by natural selection?
Answers
Answer:
He realized that the tortoises shells changed to better suit the environment they were living in
Not sure if this helped but I hope it did :)
Related Questions
How many half-lives have passed when there are three times as much daughter isotope as parent isotope?
Answers
Answer:
2
Explanation:
1/2=0.5
0.5/2=0.25
0.25:0.75=1:3
if an inhibitor of alcohol dehydrogenase is added to the above suspension, the cells rapidly die because
Answers
If an inhibitor of alcohol dehydrogenase is added to a suspension of cells, the cells rapidly die because alcohol dehydrogenase plays a crucial role in metabolizing alcohol (ethanol) in the cells.
Alcohol dehydrogenase is an enzyme that breaks down ethanol into acetaldehyde. Acetaldehyde is then further metabolized by another enzyme called aldehyde dehydrogenase, which converts it into acetic acid. Acetic acid is then converted into carbon dioxide and water, which are harmless to the cells.
When an inhibitor is added to the suspension, it blocks the function of alcohol dehydrogenase. This leads to the following consequences:
1. Ethanol accumulates in the cells, causing toxicity and damaging cellular structures.
2. Acetaldehyde, a toxic byproduct, is not efficiently produced and eliminated, leading to an imbalance in the metabolic pathway.
3. Cellular functions are disrupted due to the presence of excess ethanol and the absence of its proper breakdown.
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1. You have set up a cell-free transcription system in a test tube. By mixing DNA, RNA polymerase, sigma factors, ribonucleotides and other essential substances you are able to make mRNAs identical to those made under a variety of conditions in the cells from which these components were isolated. What would happen if you were able to remove the sigma factor first added to the tube and replace it with another sigma factor
Answers
Answer:
Different messenger RNAs (mRNAs) would have been produced
Explanation:
Sigma factors are protein subunits that form bacterial RNA polymerases and they are responsible to initiate RNA synthesis. The number of sigma factors is variable between different bacterial species. For example, Escherichia coli contains seven sigma factors, while Bacillus subtilis has at least 17 sigma factors, which control the transcription of different genes. These factors determine the specificity of the RNA polymerase to the target gene promoter regions and then control transcription initiation.
The gustatory system is the sensory system that deals with smell. True or False
Answers
Answer:
False gustatory system is the system or sense of taste
About the groundwater recharge zone and discharge zone, which of the following statements is NOT correct Spring is a recharge zone Melted snow could be a recharge source Surface stream can either be a recharge or discharge zone Precipitation is a recharge source for groundwater
Answers
About groundwater recharge and discharge zones, The statement "Spring is a recharge zone" is NOT correct.
Groundwater recharge zones are areas where water from precipitation, melting snow, or surface streams infiltrates into the ground and replenishes the underlying aquifer. Recharge sources include melted snow, precipitation, and sometimes surface streams.
Discharge zones, on the other hand, are areas where groundwater flows to the surface and becomes part of surface water bodies, such as springs, rivers, or lakes. Springs are considered discharge zones because they are locations where groundwater emerges naturally at the surface.
Surface streams can either be recharge or discharge zones, depending on the local hydrogeological conditions. In some cases, surface streams may lose water to the groundwater system (recharge), while in other cases, they may receive water from the groundwater system (discharge).
In summary, springs are not recharge zones, but rather discharge zones where groundwater flows to the surface. Melted snow, precipitation, and sometimes surface streams can be recharge sources for groundwater, while springs are discharge zones.
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match the following area of the cerebrum with its function: precentral gyrus of the frontal lobe
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The precentral gyrus of the frontal lobe is responsible for voluntary muscle movement, also known as motor function.
It is located in the posterior part of the frontal lobe and is also referred to as the primary motor cortex. This area of the cerebrum is responsible for initiating movements, controlling the intensity and speed of movements, and coordinating movements of different body parts. It receives input from other areas of the brain, such as the basal ganglia, and sends signals to the spinal cord and peripheral nervous system to execute the desired movement. Damage to this area can result in motor deficits, such as weakness or paralysis on one side of the body. Overall, the precentral gyrus plays a crucial role in the control of voluntary movement, making it an essential component of the motor system in the brain.
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True or False?
If x > 0, then x + 2 = 7.
Answers
Answer:
True
Explanation:
If x > 0, the value if x becomes 5
5 + 2 = 7
Which makes the statement true
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distinguish between biodegradable and non biodegradable materials
Answers
Biodegradable and non-biodegradable are like day and night. Biodegradable products do not harm Mother Nature and the environment because they have the ability of the Incredible Hulk to decompose into safe substances. Non-biodegradable materials, on the other hand, are like obsessive former best friends who won't let go and stay around forever, clogging landfills and polluting our planet like there's no tomorrow. In other words, biodegradables are angels in disguise, and non-biodegradables are the bad guys we should stay away from like a bad cold if we want to prevent the end of the world as we know it due to pollution. Be kind to nature by selecting biodegradation over eternal punishment the next time you have to choose between an apple core and a plastic straw.
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CHAPTER 14
4. A population’s growth rate is the ____________ rate minus the _____________ rate.
5. When a cause of death is density _____________________, a certain proportion of a population dies regardless of the population’s density.
6. A close relationship between two species in which each species provides a benefit to the other is called ______________________.
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what does the first cervical vertebra (c1 or atlas) lack?
Answers
The first cervical vertebra (C1), also known as the Atlas, is a unique vertebra in the human spine due to its specific anatomical features. Unlike other vertebrae, the Atlas lacks a body and a spinous process.
This absence allows it to accommodate the skull's movements and facilitate the critical functions of nodding and rotating the head. The Atlas also features a set of articulating surfaces that form a joint with the second cervical vertebra (C2), known as the Axis. This joint, called the atlanto-axial joint, enables the rotation of the head from side to side.
In summary, the first cervical vertebra (C1) or Atlas is distinct from other vertebrae because it lacks a body and spinous process, allowing for a greater range of motion in the head and neck.
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how could you describe this fossil? something an organism did something produced biologically by the organism, but not the organism itself the remains of a body are embedded in the rock
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This fossil is the physical evidence of a once-living organism that has been preserved in stone.
It is the remains of the organism that have been preserved within the rock and can include anything from bones, teeth, shells, and even soft tissues. This fossilized material is what we use to understand the ancient life forms that lived long ago.
The fossil can also provide us with an insight into the environment in which the organism lived as the fossilized material will have been formed from the conditions of the environment it was in when it died.
This can include the type of sediment, the amount of pressure, and the chemical makeup of the environment. By studying the fossil, we can get a better understanding of the ancient world and the organisms that lived in it.
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a student analyzing dividing cells of a certain type under the microscope finds that each daughter cell produced contains half the number of chromosomes as its parent cell. given this, cells of this type would most likely contain all of the following except: a. peroxisomes. b. nuclear pore proteins. c. single-stranded genomes. d. microtubule
Answers
Option c is Correct. With the exception of single-stranded genomes, cells of this sort would most likely contain all of the following.
When dividing cells of a certain type are examined under a microscope, the student discovers that each daughter cell has half as many chromosomes as the parent cell. Chemicals released into the PCM by intestinal epithelial cells stimulated the transcription of LEE genes. A cell's nucleus is a tiny, compact substance with a sphere shape.
It is frequently referred to as the "control center" since it manages all cellular functions, including cell division and heredity. The Western blot method is a crucial laboratory procedure for identifying proteins in blood or tissue samples. It aids in the identification of certain protein molecules in a complicated protein mixture.
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If the insects are exposed to this toxin, explain how this toxin can also reach lizards and predatory birds based
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• construct a phylogenetic tree that summarizes the current understanding of the relationships among the major animal groups
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The phylogenetic tree is a diagram that represents the evolutionary relationships among different species or groups. When it comes to the relationships among the major animal groups, the current understanding is based on a combination of molecular and morphological evidence.
The first major split in the animal kingdom is between the Parazoa (sponges) and Eumetazoa (all other animals). Within the Eumetazoa, the next major split is between the Radiata (jellyfish, corals, and sea anemones) and the Bilateria (all other animals).
The Bilateria are further divided into two major clades, the Protostomia and Deuterostomia. Protostomes include arthropods (e.g. insects, spiders), mollusks (e.g. snails, clams), and annelids (e.g. earthworms). Deuterostomes include echinoderms (e.g. starfish), hemichordates (e.g. acorn worms), and chordates (e.g. vertebrates).
Within the chordates, the first major split is between the jawless fish (e.g. lampreys) and the jawed fish (e.g. sharks, bony fish). The next split is between the cartilaginous fish (e.g. sharks) and the bony fish (e.g. salmon, trout). Tetrapods (animals with four limbs) evolved from bony fish, and this group includes amphibians (e.g. frogs), reptiles (e.g. snakes, lizards), birds, and mammals.
In summary, the phylogenetic tree of the major animal groups shows the evolutionary relationships among different species or groups based on molecular and morphological evidence. It is important to note that this understanding may continue to evolve as new evidence emerges.
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Place the events of the micturition reflex in chronological order.1. Action potentials transmitted from the spinal cord to the urinary bladder by pelvic nerves2. Contraction of destrusor muscle of the urinary bladder3. Urine in the bladder stretches wall of the urinary bladder.4. Action potentials transmitted from stretch receptors along pelvic nerves to the sacral region of the spinal cord
Answers
The chronological order of the events in the micturition reflex is:
3. Urine in the bladder stretches the wall of the urinary bladder.
4. Action potentials are transmitted from stretch receptors along pelvic nerves to the sacral region of the spinal cord.
1. Action potentials are transmitted from the spinal cord to the urinary bladder by pelvic nerves.
2. Contraction of the detrusor muscle of the urinary bladder occurs.
The micturition reflex, also known as the urination reflex or voiding reflex, is the physiological process by which the bladder contracts and empties urine from the body.
It is a complex reflex arc that involves the coordination of several structures and nerves in the urinary system.
The micturition reflex is initiated when the bladder reaches a certain level of distention, signaling the need for urination.
The process can be divided into two main phases: the storage phase and the voiding phase.
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What does it mean to germinate?
A To stay underground
B To stay covered
C To start to die and wither
D To sprout or grow
Answers
Answer: the answer is to sprout or grow
Why are disease and infection easily given
to organisms that reproduce sexually?: The given because they are easier to be transmitted threw unsafe sexual activity
D
Explanation:
Definition of germinate
(of a seed or spore) begin to grow and put out shoots after a period of dormancy.
Angiosperms are such a successful group of plants because of how well they recruit animals for pollination and the diverse way they disperse their seeds. Describe two ways animals spread angiosperm pollen and two ways fruit is dispersed.
Answers
Answer:
- pollen dispersal: insects and birds are able to spread the pollen of flowers for reproduction
- fruit dispersal: many different mammals (including for example mice, kangaroo, and elephants) eat fruits and then disperse their seeds
Explanation:
Pollination is the process of transfer of pollen (i.e. male gametes) from plant male reproductive structures (called anthers) to the plant female reproductive organ (stigma). For example, hummingbirds pollinate flowers no other animal can (nectar of these flowers is used as food source). Similarly, honey bees pollinate flowers by transferring pollen from the male anther of a flower to the stigma of another flower. On the other hand, many animals (such as, for example, mice) eat different types of fruits and then disperse their seeds by excreting them. In addition, there are fruits with hooks that attach to the hair of many mammals and thus they can be dispersed to far away places.
It should be noted that birds and insects are pollinators and can spread angiosperm.
It should be noted that pollination simply means the process of transferring pollen from the anthers to the stigma.
The ways of dispersing fruits can be through pollen dispersal such as insects and birds spreading the pollen of flowers for reproduction.
Also, it can be through fruit dispersal as many different mammals like bats, kangaroos, etc.
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Every cell in your body contains organelles (structures that have specific functions) Just like organs in the body, each organelle contributes in its own way to helping the cell function One organelle found in both plant and animal cells ads like the cell's shipping and delivery center A major function of this organelle is the modifying, sorting and packaging of proteins for secretion which organelle sonts and packages proteins for secretion? (SC 912 L 143 - Sub Cat SC 912 1 142) O Endoplasmic reticulum O Golgi Apparatus Peroxisomes 0 Lysosomes
Answers
Answer:
B
Explanation:
You work in a lab that studies brains and behavior. You and your labmate have both submitted rodent brains to a colleague to be sectioned. Your species is a squirrel that is known for storing large numbers of nuts each autumn in a variety of hidden locations. Your labmate's species is a mole with almost nonexistent eyes. How do you predict their brains will compare
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The squirrel had a larger brain and is smarter. I say this because the squirrel has to be smart enough to gain a large amount of nuts, hide those nuts from others, and remember where those nuts are. On the other hand, the mole is less smart bc it is primarily underground. The mole's location underground helps to keep it safe from other predators so it doesn't have to worry too much about that. the mole also can't see which means that sight isn't of enough importance to keep.
Complete the phrase below. Each member must contribute one complete sentence. The words prokaryotic and eukaryotic must be used:
Answers
Answer: for bacteria and fungi, protozoan, plantae and animalia.
Explanation: Prokaryotic cells have-:
genetic material on single chromosome,do not have nuclear membrane,single cell have simple structure,golgi bodies, chloroplast, and lysosomes are not present.Eukaryotic cells have-:
nuclear membrane present,mitochondria is present,cell divide by mitosis,cell wall is present.A. Discuss the transfer of biomass when one organism eats another. Use your knowledge of digestion to discuss how food is broken down and used by the consumer.
Answers
Biomass is transferred from one organism into another through the eating of another organism.
It should be noted that food is broken down as the body of the organism converts the biomass that is eaten into micro-molecules such as fatty acid, glucose, and amino acid.
Furthermore, when an organism eats another organism, then only 10% of the energy of the biomass will be transferred into the organism while 90% of the energy is lost as heat energy. When we go up in the energy pyramid, the number of organisms will reduce due to the fact that there is less food that's available for the organisms at the top of the pyramid. An example is when there are 100 herbivores that are present in a jungle while the carnivores are 10. It implies that there are typically fewer organisms at the top of an energy pyramid.
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what was the first disney animated film based on the life of a real person?
Answers
Answer:
"Pocahontas" is the right answer! (:
What do facilitated diffusion and active transport have in common? O Both involve the use of energy provided by ATP. Neither require ATP to function. Both involve transport of a solute down its concentration gradient. Both involve transport of a solute up its concentration gradient. Both are examples of carrier-mediated transport.
Answers
Facilitated diffusion and active transport both involve transport of a solute down its concentration gradient.
Option (c) is correct.
Although they have significant differences, one key similarity is that both processes involve the movement of solutes down their concentration gradients.
Facilitated diffusion is a passive process that uses carrier proteins or channel proteins to facilitate the movement of solutes across the membrane. It does not require the input of energy in the form of ATP.
Active transport, on the other hand, is an energy-dependent process that involves the movement of solutes against their concentration gradients, from areas of lower concentration to higher concentration.
While both facilitated diffusion and active transport involve the movement of solutes, only facilitated diffusion occurs down the concentration gradient, whereas active transport occurs against the concentration gradient.
Therefore, the correct answer is that both processes involve transport of a solute down its concentration gradient (option c).
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The complete question is:
Which of the following statements accurately describes a similarity between facilitated diffusion and active transport?
a) Both involve the use of energy provided by ATP.
b) Neither requires ATP to function.
c) Both involve transport of a solute down its concentration gradient.
d) Both involve transport of a solute up its concentration gradient.
e) Both are examples of carrier-mediated transport.
What can you tell about the sex of this person where the chromosomes came from?
Answers
Answer:
Females have two X chromosomes in their cells, while males have both X and a Y chromosomes in their cells. Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome. This arrangement means that it is the male that determines the sex of the offspring when fertilization occurs.
Explanation:
_________ inhibits ca2 deposition by osteoblasts and ca2 excretion by the kidneys.
Answers
Calcitonin inhibits Ca₂ deposition by osteoblasts and Ca2 excretion by the kidneys.
Calcitonin is a hormone produced by the thyroid gland. It inhibits calcium deposition by osteoblasts and calcium excretion by the kidneys, and plays an important role in the body’s regulation of calcium ion concentration.
Calcitonin is produced by the parafollicular cells of the thyroid gland in response to excessive serum calcium ion concentration, or to an increase in the rate of bone formation. It acts on the osteoblasts to decrease calcium deposition, and on the kidneys to increase calcium excretion, thus helping to maintain normal blood calcium levels.
It has also been found to help in the triggering of osteoclast-mediated bone resorption. The hormone is also believed to stimulate the synthesis of other proteins involved in skeletal mineralization.
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construct a food chain found in the aquatic habitats . show 3,4,5 trophic levels
Answers
Answer:
Phytoplankton
Curstacae
Fish
Dolphine
Killer Whale
This is an example of an aquatic food chain sorry fr the delay
Answer:
Phytoplankton
Curstacae
Fish
Dolphine
Killer Whale
Scientific Investigations
Prior to starting their science fair investigations, the students in Mrs. Hensley's biology class are required to submit a summary of
their experimental designs. One student submitted the following:
• Hypothesis:
Fertilizer X increases fruit production in tomato plants.
Two tomato seeds will be germinated at the same time.
Each germinated seed will be placed in a separate 500 mL container.
• Procedure:
• Exactly 500 g of soil will be added to each container, and the germinated seeds will be placed 1 cm below the surface.
20 g of Fertilizer X will be added to one plant.
Og of Fertilizer X will be added to the second plant.
Each plant will receive the same amount of water and light each day.
• After 60 days, the total number of tomatoes produced by each plant will be counted
The teacher identified a problem with the procedure and asked the student to revise the method. Which of the following is a problem
with the student's procedure?
OA. The procedure is missing a control.
OB. The procedure includes too many independent variables.
OC. The procedure is lacking multiple trials.
OD. The procedure includes too many dependent variables.
0 of 25 Answered
Reset
Submit
ТО
Answers
Fertilizer X increases fruit production in tomato plants. The teacher identified a problem with the procedure and asked the student to revise the method because of Option C. The procedure is lacking multiple trials.
Fertilizer is any cloth of herbal or synthetic foundation that is applied to soil or to plant tissues to deliver plant most gardeners ought to use a complete fertilizer with two times as lot phosphorus as nitrogen or potassium.
Urea is the maximum not unusual N fertilizer, but many greater extremely good N fertilizers derive from ammonia. for example, a little ammonia is oxidized to make nitrate fertilizer. This same conversion of ammonia to nitrate takes area in agricultural soils via the microbial system of nitrification
Fertilizer is simplest whilst used on plants at their top growing cycle. that is when the plant is leafing out for deciduous species, flowering, or setting on new growth after leaving the dormant winter degree. The time of yr for fertilizing most flowers could then be spring.
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Answer: The procedure is lacking multiple trials.
Explanation:
Based on the graph, how would Cook County, Georgia, be affected in the future if the trend continues and aquifers are eventually depleted
Answers
We can see here that Cook County, Georgia, will be affected in the future if the trend continues and aquifers are eventually depleted in the following way: C. Farmers would have less or no water for irrigation
What is trend?A trend refers to a general direction or pattern of change in a particular field, domain, or society over a period of time. It represents the prevailing tendency or inclination towards a certain style, behavior, concept, or phenomenon that gains popularity or widespread acceptance.
Trends can emerge in various areas, including fashion, technology, culture, business, social media, entertainment, and more.
The graph shows that the water level in the aquifer is decreasing over time. This means that there will be less water available for irrigation in the future.
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The complete question is:
Based on the graph, how would Cook County, Georgia, affected in the future if the trend continues and aquifers are eventually depleted?
USGS well 18H016, Cook County, Georgia
160
165
170
175
180-
185
1967
1974
1981
Year
1988
1995
2002
A. Land may rise because the weight of the water no longer compacts it.
B. It would become easier to cultivate crops.
C. Farmers would have less or no water for irrigation
D. Vegetation fed by groundwater would flourish.
analysis of a glandular secretion indicates that it contains dna, rna, organelles and membrane components such as phospholipids. what kind of secretion is this?
Answers
The right response is This form of secretion is holocrine. DNA, RNA, and membrane components are indicators indicating the cell was killed off during secretion. This is in line with a holocrine secretion type.
Holocrine secretion is a particular type of secretion that occurs in the multicellular exocrine glands of mammals, birds, and reptiles. It involves the release of the complete cytoplasm along with the remains of dead cells.
Here, we discovered that the sebaceous glands of mice, which are an example of multicellular exocrine glands in mammals, display a type of polarized stratified epithelium with tight junctions (TJs), and that holocrine secretion took place outside the TJ barriers.
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the following reaction in the tca cycle is facilitated by what type of enzyme?
O transferase O isomerase O ligase O oxidoreductase
Answers
The following reaction in the TCA cycle is facilitated by the type of enzyme known as oxidoreductase.
Oxidoreductases are a class of enzymes that catalyze the transfer of electrons from one molecule to another.
They play a crucial role in the TCA cycle, which is a series of chemical reactions that occur in the mitochondria of cells and are responsible for generating energy in the form of ATP. The TCA cycle is also known as the citric acid cycle or the Krebs cycle.
In the TCA cycle, oxidoreductases facilitate the conversion of molecules such as NAD+ to NADH and FAD to FADH2, which are then used to generate ATP through the process of oxidative phosphorylation.
Without the action of these enzymes, the TCA cycle would not be able to produce the energy that is needed for cellular processes.
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