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Elza [17]
3 years ago
9

Which of the following does not occupy the bottom of an energy pyramid?

Biology
2 answers:
SVEN [57.7K]3 years ago
6 0
Well a,b and c are plants


But d) Zooplankton is a type of animal and does not belong at the bottom of the pyramid. 


Good luck! (: 
TEA [102]3 years ago
5 0

Hello there!!

Energy pyramid is the graphical model that shows the flow of energy in a community. The levels of the pyramid shows different microorganisms in the food chain. One of the many organisms that occupy the bottom of the pyramid is letter D. zooplankton. 

Hope this helped and have a fantastic day ^-^

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Contrast penetrance and expressivity as the terms relate to phenotypic expression.
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Answer:

d. Expressivity refers to the range of expression of a given phenotype.

e. Penetrance refers to the percentage of individuals that expresses the mutant phenotype.

Explanation:

Penetrance is the probability of a gene being expressed. Sometimes, phenotype is not observed even when the dominant allele is present. It is a result of various genetic and environmental factors coming together.This phenomenon is called as incomplete or reduced penetrance. For example: polydactyly trait is produced by a dominant allele but its penetrance is low in general population hence few people show this trait.

Expressivity is the variation in phenotypic expression when an allele is penetrant. Same genetic combination for a trait can have different expressivity in the same population. This phenomenon is also a result of genetic and environmental factors acting together. For example: people who do end up showing polydactyly trait may show it to different degrees. Some might have one extra finger, some might have two. Some might have a stub, some might have a full grown finger.

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zubka84 [21]

Answer:

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If we have a neutral mutation rate of one mutation per 5 million years, then the total of eight mutation between the two different species would be 20 million years. This is because both species will have 4 mutations in those 20 million years, so combined, both by 4, will have 8 mutations between them. So few mutations on so much time will result in two species that are very similar to each other even after 20 million years of evolution, even making them hardly distinguishable, especially if it comes to defining fossil records from them both. A nice example of this are the members of the felidae (cat) family, which are all very closely related, and are almost identical, thus making it extremely hard to distinguish two species of the same or similar size by their fossils.

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Explanation:

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