Mitotic cell division is never used by organisms as a means of reproduction.
Answer the following statement true (T) or false (F)
False
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Stem cells divide and become immunocompetent.
Human birth weights are kept in teh range of 3-4 kilograms by ____________ selection.
Fill in the blank(s) with the appropriate word(s).
Which of the following is a limit of evolution that results in exaptations?
A) Natural selection and sexual selection can work at cross-purposes to each other. B) Evolution is limited by historical constraints. C) Adaptations are often compromises. D) Chance events affect the evolutionary history of populations in environments that can change unpredictably.
Structure in the living world is organized into hierarchical levels. Which of the following correctly lists these from least inclusive to most inclusive?
A) neuron, nervous system, nerve tissue, human B) neuron, nerve tissue, brain, nervous system, human C) neuron, brain, nervous system, nerve tissue, human