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saw5 [17]
3 years ago
6

Over time, color variation in a population of butterflies declined. The number of color variations within the population was twe

lve in 1985. In 2005, the number of color variations reduced to three. What type of selection is responsible for reducing variation?

Biology
2 answers:
Serhud [2]3 years ago
4 0

Answer:

Stabilizing selection.

Explanation:

Stabilizing selection is an type of natural selection. Stabilizing selection is the natural selection whereby the population (population mean) of species are stabilized or maintained by reducing the variation in the DNA sequence of the genomes of a population.

Examples of stabilizing selection is

a. the weight at which a person is born.

b. The outer coat or fur of animals.

valina [46]3 years ago
3 0

The answer is stabilizing selection. This type of natural selection in which the population mean stabilizes on a particular non-extreme trait value. This type of natural selection is the most widely seen in which there are no drastic changes in traits of the population in long times. Extreme traits of the population are weeded out hence the subsequent generations of the population have less diversity than the initial. The illustration below shows this model in relation to the others.


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8 0
2 years ago
explain why a continuous increase in carbon dioxide levels will not cause the rate of photosynthesis to increase continuously?​
Zepler [3.9K]

Answer:

An increase in the amount of CO2 well increase the rate of photosynthesis, Carbon dioxide concentration will directly affect the rate of photosynthesis as it is used in the photosynthesis reaction.Increased amount of CO2 will increase the rate of photosynthesis to a certain limit, after which a further increase in its amount will no longer increase the rate any further. This is when the other factors necessary for photosynthesis, such as light, become "limiting reactants"; that is, those other factors also need to increase to bring about a further increase in the rate.

six molecules of water plus six molecules of carbon dioxide produce one molecule of sugar plus six molecules of oxygen

An increase in the amount of water leads to the increase in the amount of photosynthesis

The amount of water available to the plant will affect the rate of photosynthesis. If the plant does not have enough water, the plant's stomata will shut and the plant will be deprived of CO², and thus lower photosynthesis rate.

An increase in the amount of light well increase the amount of photosynthesis, if the light intensity increases the rate of the reaction will increase at a proportional rate until a certain level is reached, the rate of increases will then go down.

Other factors affecting the rate of photosynthesis :

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2. The availability of nutrients

Explanation:

5 0
3 years ago
Help please i will mark brainlist!
suter [353]

Answer:

dear student answer us C

5 0
2 years ago
Read 2 more answers
Select all of the answers that apply.
Bas_tet [7]
<span>The correct answer is A, B and D. Biogeochemical cycles are central to the ecology of earth system. They make the essentail elements accessible and available for the organisms, and maintain their levels, so that the ecology is ot disrupted. The elements move through abiotic and biotic factors, in these cycles, and a state of equilibrium is maintained n the ecosystem. The carbon dioxide levels are responsible fr the temperature of the earth. If Carbon cycles would not have existed, then there would have been a disruption in maintaining the global temperature. Biogeochemical cycles basically continuously recycles the essential materials, for sustaining the life-forms.</span>
3 0
3 years ago
Read 2 more answers
A dichotomous key may be used to classify butterflies.
kirill115 [55]
Well yes, but a dichotomous key can be used to classify just about anything you want.
Hope that helped
4 0
3 years ago
Read 2 more answers
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