Biology, 10.03.2022 08:10, SushiMagic
Scientists compare a fossil of a species that lived 5,000 years ago with members of the same species today. They notice there are several differences between the two. What most likely can be said about the environment and the species?
A.
The environment changed significantly, but the species did not change.
B.
The environment changed significantly, causing the species to change over time.
C.
The environment did not change significantly, and the species developed new mating habits.
D.
The environment did not change significantly, but the species changed over time.
Answers: 3
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Explain the process that creates the heat of the sun?
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Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.
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What is required in the genotype of an individual to show a recessive trait? a. two recessive alleles b. at least one recessive allele c. no recessive alleles
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Scientists compare a fossil of a species that lived 5,000 years ago with members of the same species...
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