Answer:
In biology it refers to observed changes in organisms, to their descent from a common ancestor, and at a technical level to a change in gene frequency over time; it can also refer to explanatory theories (such as Charles Darwin's theory of natural selection) which explain the mechanisms of evolution. Natural selection
There are two major components to the theory. The first is the mechanism of natural selection, which was proposed independently by Charles Darwin and Alfred Russell Wallace in 1858.
In the same way artificial selection occurs when breeders choose seeds or studs that will improve their stock in the next generation, natural selection is the process of sorting living things according to how well adapted they are to their environment.
In the case of artificial selection, humans choose which traits are desirable. In the case of natural selection, traits that increase the likelihood of survival and reproduction will become more common within a population or species over time.
In the past, natural selection has been misrepresented by calling it the survival of the fittest. This statement oversimplifies the mechanism by making it sound like a tautology: the survival of those who survive.
The truth is that individuals never survive. What survives is the process for making another individual, and this resides in genes found in populations.
Natural selection has more to do with differential reproduction than survival, and what it selects are the genes that code for desirable traits or characteristics. The interaction of individuals with their environment provides a mechanism for sorting out which traits (not which individuals) will be passed on to the next generation.
Nature of inheritance
The second major component to the theory is the nature of inheritance, which follows the insights made by Gregor Mendel in 1865 and has advanced considerably since then due to our understanding of genes, DNA and the molecular processes of life.
When natural selection was first formulated by Darwin, the nature of inheritance was not understood. Our current understanding of inheritance is very sophisticated and includes the precise mechanisms for passing genes on to the next generation, how genes are modified by mutation and how they are shared among sexual species.
If we know enough about a gene and its various forms, it is possible to accurately predict the change in the frequency of those genes over time using mathematical formulae from population and evolutionary genetics theory.
This alteration of gene frequencies is subtle and does not, at first glance, seem worthy of being called evolution. But it is precisely these small changes at the genetic level that lead to large changes in the organisms that carry them.
The sorting of genes affects the fate of populations: populations drift apart and become species, and species diverge to create whole groups of plants or animals that dominate the landscape for millions of years.
The intricate details of cellular processes are responsible for the glorious and majestic diversity of life on our planet.
The theory of evolution includes large changes over vast periods of time and tiny changes made when one cell divides into two.
These processes form a continuum that is the history of life on Earth
Answer:
If we know enough about a gene and its various forms, it is possible to accurately predict the change in the frequency of those genes over time using mathematical formulae from population and evolutionary genetics theory.
This alteration of gene frequencies is subtle and does not, at first glance, seem worthy of being called evolution. But it is precisely these small changes at the genetic level that lead to large changes in the organisms that carry them.
The sorting of genes affects the fate of populations: populations drift apart and become species, and species diverge to create whole groups of plants or animals that dominate the landscape for millions of years.
Explain why scientists believe the Abert’s and Kaibab squirrels are examples of speciation.
Answer:
The Abert’s squirrel is found on the south rim of the grand canyon and surrounding states.
The Kaibab squirrel can only be found at the north rim of the canyon.
Scientists believe they were separated by plateau erosion that separated the forests of the Grand Canyon, isolating the Kaibab population of squirrels.
Explanation:
Answer:
Kaibab squirrels became geographically isolated from Abert's squirrels, which are found on the south rim of the canyon. In isolation, Kaibab squirrel« evolved distinct characteristics, such as a complete whitetail. Abert's squirrels are the original species from which Kaibab squirrels diverged.
what do the effect of catalase on the decomposition of hydrogen peroxide
Catalase is an enzyme that accelerates the breakdown of hydrogen peroxide into water and oxygen in the body. This is a critical process because hydrogen peroxide is harmful to cells. The reaction is expedited by catalase, which acts as a catalyst, without being consumed or changed permanently.
Explanation:Catalase found in cells, particularly in peroxisomes, plays a crucial role in the decomposition of hydrogen peroxide (H₂O₂) into water (H₂O) and oxygen (O₂). This reaction is important because hydrogen peroxide is a potentially harmful byproduct of various metabolic processes in cells, and its buildup can be toxic. In the process, catalase acts as a catalyst, meaning that it speeds up the reaction without being used up or altered permanently. For example, if you put a piece of liver (which contains a lot of catalase) into hydrogen peroxide, you'll notice effervescence or bubbling. This bubbling is oxygen gas being produced from the decomposition of hydrogen peroxide by catalase.
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As the water crisis gets worse, which of the following does NOT increase?
A)The number of water consumers
B)The demand for water
C)The supply of clean water
D)The price of water
C) The supply of clean water.
The water crisis is because there's not enough clean water, mainly because the population is rising. Because demands are rising, prices rise as well so that water companies can make a profit.
Answer:
The supply of clean water
PLEASE HELP Step 5: The blood then goes through the _______ side of the _________ to the ______________ It leaves the heart through the _________. Then the blood travels through the __________ releasing _________ to the cells for __________ and absorbs _________.The gas exchange occurring here between the oxygen and carbon dioxide molecules occurs in the _______ of the organs. The blood then goes back to the ________ side of the _________ through the veins and will go through the ________ again.
Answer:
The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve.
The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve.
The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve.
The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.
What is a 2-factor cross biology
Answer:
23 +34
Explanation:
because its math
Final answer:
A 2-factor cross in biology involves studying the inheritance pattern of two different traits in offspring. It helps determine whether the traits are inherited independently or if there is any linkage between them.
Explanation:
In biology, a 2-factor cross refers to a breeding experiment involving two factors or traits. This type of cross helps determine the inheritance pattern of two different traits in offspring. For example, if we are studying flower color and plant height in peas, a 2-factor cross would involve examining how these traits are inherited together in the offspring.
One example of a 2-factor cross is the dihybrid cross, which involves studying the inheritance of two different traits at the same time. This type of cross can help determine whether the two traits are inherited independently of each other or if there is any linkage between them.
20 points). Is the following statement accurate? “Plants produce fruits primarily to provide food for animals.”
Answer:
No
Explanation:
Plants produce fruit so that
animals will eat it, digest it, and spread the plant's seeds away
from the parent plant.
What's the relationship between the temperature and the density of a substance?
A) As the temperature decreases, the density decreases.
B) Temperature doesn't affect the density of a substance.
C) Temperature decreases the density of a substance only at high altitudes.
D) As the temperature increases, the density decreases.
Answer:
answer is a i think
Explanation:
Answer:
D
Explanation:
A leech fungus and algae living together Is mutualism, commensalism, or parasitism
Fill in the blanks to complete the paragraph.
The principle of cross-cutting relationships states that certain features, such as faults, are BLANK than the rock layers they cut through. These features are breaks in Earth’s surface where rock has moved sideways, upward, or downward. BLANK formations are made of molten rock that has cooled. Those on Earth’s surface are called BLANK . Those beneath Earth’s surface are called BLANK .
Answer:
1. Younger
2.Igneous
3.Extrusions
4.Intrusions
Explanation:
I got it right hope this helps)
Answer: younger , igneous, extrusions, intrusions
Explanation:
i took the test
Which area of the brain is responsible for reasoning, judgment, planning, organization, and predicting future events?
A.Serotonin
B.thalamus
C.hippocampus
D.frontal lobe
Answer: D) Frontal Lobe
What do we refer to when we separate things into groups based on their common characteristics?
Thus, by separating organisms on the basis of a hierarchy of characteristics into smaller and smaller groups, we arrive at the basic unit of classification, which is a species.
Pls help with these questions thanks in advance
Answer:
19C is round
Explanation:
Possible genotypes 19 a) Rr and rr, b)Round and wrinkled, c)50%, d)50 %. 20 e) pink, f) CrCr, CwCw, and CrCw, h) 50%, i) 0 j) 50% 21 l) 50% m)50%, m)50%.
19 a) The possible genotypes of the offspring are Rr and rr
b) The possible phenotypes of the offspring are Round and wrinkled.
c) The probability of having a round offspring is 50%.
d) the probability that an offspring is homozygous is 50 %.
20 e) If the red snapdragon is crossed with the white snapdragon then the phenotype of the offspring is pink.
f) The possible genotypes of the offspring are CrCr, CwCw, and CrCw, where w represents the white color and r represents the red color.
g) the punnet square is attached below.
h) the probability that an offspring is red-colored is 50%
i) the probability that an offspring is white-colored is 0.
j) the probability that an offspring is pink-colored is 50%.
21 k) The punnet square diagram is attached below.
l) Both parents have one allele for the sickle cell trait. So there is a 50 % chance that the offspring has a sickle cell condition.
m) the probability that the offspring is normal is 50%.
n) the probability that the offspring is having sickle cell disease is 50%
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The diagram shows how a plant grew after being turned on its side.
In which area is the concentration of auxin most likely the highest?
1. W
2. X
3. Y
4. Z
Answer: Y or Z im not to sure
Explanation:Auxin moves and stores up away from light
Answer:
the answer is Z!
Exclamation:
because it is so yeah, also WOAH BREAD WITH CRUST
True or False: A lot of carbon dioxide releasing into our atmosphere is good for our environment.
Answer:
true
Explanation:
Answer:
True
Explanation:
plants need it to survive, please mark me as brainliest
Which of the following could be added to a tank of fish to integrate two biological systems?
A. Rocks for the fish to swim through
B. Fish food made from grains
C. Algae
D. Wild fish food
Answer:
C. Algae
Explanation:
I think it is algae because some fish use it for food source but don't blame me if I'm wrong if I am sorry.
The following could be added to a tank of fish to integrate two biological systems is Algae. Thus, option C is correct.
What are the producers?
Producers are organisms that produce their own food and not depends on any other organism by the process of photosynthesis such as algae. Primary organisms on the other hand directly depend on the producers for their food and often gt killed by secondary consumers.
Freshwater snails are the perfect example of the primary consumer as they get their food and energy from algae and are the primary source of food and energy for small fishes. The type of food that should be eaten in limited quantities would be fats. Too much of certain types of fat can lead to other health problems.
Therefore, The following could be added to a tank of fish to integrate two biological systems is Algae. Thus, option C is correct.
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A-Attached earlobes
a-Unattached earlobes
If A is the allele for having attached earlobes, what percentage of offspring will have attached earlobes?
A. 25%
B. 50%
C. 75%
D. 100%
Answer:
50%
Explanation:
somebody come get her shes dancin like a...... oops my bad , cause i took 7.07 punnet quiz
question with the T's is
TT on top and Tt on botton
question 3 is bb on both squares and if it ask for precentage on that its 50%
Thank you!
please mark brainliest
50% of offspring will have attached earlobes as shown in the given Punnett Square. So, the correct option is B.
What is Punnett Square?Punnett square is indeed a graphical representation of the potential genotypes of an offspring that results from a certain mating event. The genetic make-up of the parents must be known in order to construct this graphical representation.
This square-shaped graphic is used to predict genotypes in breeding or cross experiments. In 1905, Reginald C. Punnett invented this method. This is used by biologists to determine the probability that a specialized gene will be passed on to progeny.
According to the Punnett Square, 50% of the offspring in the case above will have attached earlobes.
Therefore, the correct option is B.
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Most bacteria are harmful. True or False?
In general there are how many types of air masses?
A:2
B5
Answer:
Generally there are 4 types or air masses
Explanation:
The 4 types of air masses are polar, tropical, continental and maritime.
Identify these reaction energy diagrams as spontaneous or nonspontaneous.
Energy
A+B
Reaction Progression
spontaneous
nonspontaneous
Answer:
Explanation:
Answer: Spontaneous, nonspontaneous, spontaneous.
Explanation: edge 2024
Researchers studied a typical hardwood forest containing a variety of trees, other plant species, fungi, and animals. The atmospheric carbon dioxide concentrations around the forest were measured in the middle of the day. The carbon dioxide concentration was lowest right next to the forest and steadily increased as the researchers measured farther away from the forest. Explain how this observation supports the Law of Conservation of Mass.
Group of answer choices
The carbon released by animals through cellular respiration is used by the trees to create food necessary for growth and maintenance
The carbon released into the atmosphere by decaying organic matter is increases as you move further away from the forest.
The carbon released by plants through photosynthesis is quickly cycled through the cellular respiration of animals.
The amount of carbon burned by fossil fuels decreases further away from the forest.
Answer:
The carbon released by animals through cellular respiration is used by the trees to create food necessary for growth and maintenance.
Explanation:
Since the trees are using the Carbon to grow they end up absorbing most of it therefore the levels of carbon on the forest are a lot smaller in quantities.
During the process of respiration, carbon is released by animals which is used by the trees in the process of photosynthesis to produce food for itself.
The carbon released by animals through the process of cellular respiration is used by the trees in order to create food that is necessary for growth and maintenance of the plant itself and for other organisms living in that ecosystem.
In this way the plants clean the environment and reduces the concentration of carbondioxide gas in the environment so we can conclude that carbon that is produced by the animals can be used by the other organism for itself supports the law of conservation of mass.
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Use the drop-down menus to answer each question about rock formation.
Which type of rock is formed from molten materials?
Which type of rock needs weathering or erosion to form?
The type of rock that is formed from molten materials is known as igneous rock. While the type of rock that needs weathering or erosion to form is known as sedimentary rock.
What is Weathering?Weathering may be defined as a process through which numerous rocks and minerals found on the earth's surface are considerably broken down into smaller fragments. The process of weathering is facilitated by different components like water, wind, ice, etc.
On the other hand, Erosion is different from weathering. This is because erosion deals with the transportation of broken substances or materials through weathering from one place to another with the help of air and water.
It is the gradual destruction and elimination of rock or soil in a particular area. The sedimentary rocks evolved from the activities of erosion and weathering.
Therefore, igneous rocks are formed from molten materials, and sedimentary rocks are formed from weathering or erosion.
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Answer:
A and C
Explanation:
Igneous and Sedimentary
in which region do earthquakes, originate due to a transform boundary, most likely occur
Answer: ectonic earthquakes occur anywhere in the earth where there is sufficient stored elastic strain energy to drive fracture propagation along a fault plane. The sides of a fault move past each other smoothly and aseismically only if there are no irregularities or asperities along the fault surface that increase the frictional resistance. Most fault surfaces do have such asperities and this leads to a form of stick-slip behavior.
Explanation:
Answer:
Majority are found on the sea floors with two ocean ridges. Example of this is in California.
Scientist who study climate changes are concerned that global warming may increase the frequency or intensity of tropical cyclones. What predicted effect of global warming would increase the destructive power of hurricans?
Global warming and hurricanes
Explanation:
Global warming and climate change lead to erratic and more destructive patterns in natural disasters like hurricanes.
Increasing global temperature has also increased the frequency of highly devastating major hurricanes. The major hurricanes which occurred once in many years or even once in a century, now occurs very frequently like once in a decade or less.
Global warming increases the sea surface temperature which in turn increases the sea level. This piling of water leads to storm surges along coastal lands.
With increasing sea surface temperature and high humidity, increases the hurricane intensity. Further, increased temperature leads to high wind at varying altitude over the sea surfaces which causes vertical wind shear that can worsen the hurricane effects.
The predicted effect of global warming would increase the destructive power of hurricanes is that warmer sea surface temperatures intensifies tropical storm wind speeds.
What is Global warming?This is defined as long-term heating of Earth's climate system sa result of the release of greenhouse gases.
This causes sea temperature to increase which brings about an increase in the intensity of tropical storm wind speeds.
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It is a small zone inside a larger ridge called Mariana Trench
If there were no variation among organisms of a species new species would
Answer:
Overpopulate
Explanation
Because they would interact with each other positively.
Please help with this question it is in the attachment below
It is just science not really biology just about continental drift.
Answer:
Q:what happens when a continent moves towards the poles?
A:The climate gradually gets colder and dryer
Explanation:
Most members of the
kingdom feed by absorbing
nutrients from dead or decaying organisms.
A. Protist
B.Fungi
C. Animal
A scientist has completed several trials to see how a new drug affects adults.
Which step will best assess the validity of his experimental design and results?
Answer:it is C
Explanation:i took the quiz
14. Albinism (represented by letter Aer a) is a recessive autosomal (not sex-
linked!) genetic disorder that causes the complete or partial absence of
pigments in the skin, hair, and eyes. Fill in the Punnett square to determine the
expected offspring in a cross between homozygous recessive and heterozygous
parents.
14 a. What is the genotype of the homozygous recessive parent?
14b. What is the genotype of the heterozygous parent?
14.Sc. What is the phenotype (albino or normal) of the homozygous recessive parent?
14.d. What is the phenotype of the heterozygous parent?
14.e. What percent of their offspring will be albino?
14.f. What percent of their offspring will be normal?
Answer:
14a: aa
14b: Aa
14c: Albino
14d: normal
14e: 50%
114f: 50%
Explanation:
Which freshwater ecosystem is least productive?
O
A. Swamp
O
B. Stream
O
C. Bog
O
D. Marsh
Answer:
bog
Explanation: for the boyzzz bby
Bog freshwater ecosystem is least productive, because of its stability, or should we say stagnant variety, the freshwater bog ecosystem is the least productive, hence option C is correct.
What is freshwater ecosystem?Aquatic habitats on Earth are divided into freshwater ecosystems. They consist of marshes, rivers, streams, lakes, ponds, rivers, streams, and wetlands.
They can be compared to marine environments, which contain more salt than terrestrial ecosystems.
The least fruitful environment is the “bog freshwater” ecosystem. This form of ecosystem includes evergreen trees, shrubs, and shrubbery as well as a floor that is covered in a thick layer of sphagnum moss.
Therefore, bog freshwater ecosystem is the least productive.
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