The fact that regeneration is a common type of reproduction in invertebrates suggests that
A. fertilization of eggs is not necessary.
B. sexual reproduction is too costly.
C. mitosis must occur before differentiation can begin.
D. all the adult cells of many invertebrates retain the molecular machinery necessary to form a complete animal.
E. invertebrates live in highly unstable environments.
D. all the adult cells of many invertebrates retain the molecular machinery necessary to form a complete animal.
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Diatoms reproduce by binary fission
Indicate whether the statement is true or false
The notion that organisms that are more distantly related should have time to accumulate more biochemical differences than those more closely related can best be illustrated using
A. radioactive isotope dating. B. a molecular clock. C. gel electrophoresis. D. a geologic time scale.
An important mineral ion of the cytochrome pigments of cellular respiration is ___
A. Iron B. Zinc C. Calcium D. Magnesium E. Potassium
Engineering a metabolic pathway enables a researcher to use different genes from unrelated organisms
Indicate whether the statement is true or false.