Explain the relationship between body size and multicellularity. What will be an ideal response?
Multicellularity provided the mechanism for an organism to increase in size. Because a cell’s
size is limited by its surface-to-volume ratio, an organism cannot increase in size simply by
increasing the size of its cells. Rather, body size increases by an increase in the number of
cells.
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Which type of selection would lead to two distinct phenotypes?
A. Stabilizing selection B. Phenotype selection C. Fitness selection D. Disruptive selection E. Directional selection
In all eusocial species, sterile workers assist fertile ____ with whom they share genes
a. subordinate animals b. dominant animals c. relatives d. offspring e. leaders
Explain the difference between the one-gene?one-enzyme hypothesis and the one-gene?one-polypeptide hypothesis
What will be an ideal response?
Recombinant DNA technology
A) randomly creates new genes from free nucleotides. B) involves combining existing genes from different organisms. C) will never be of economic importance. D) is always dangerous and inevitably leads to mutations and mistakes. E) involves only changing genes in large mammals.