Totipotency is a term used to describe a cell's ability to give rise to a complete new organism. In plants, this means that _____
A) plant development is not under genetic control
B) the cells of shoots and the cells of roots have different genes
C) cell differentiation depends largely on the control of gene expression
D) a cell's environment has no effect on its differentiation
C
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The taxonomic category that includes all bipedal primates is the ______________. Fill in the blank(s) with the appropriate word(s)
Refer to Figure 7-2. The line on the graph labeled B represents the:
a. activation energy with an enzyme.
b. activation energy without an enzyme.
c. free energy of the reactants.
d. change in entropy.
e. change in enthalpy
The three domain system arose when scientists grouped organisms according to how long they have been
a. alive in their present forms b. going extinct c. evolving independently d. using DNA to store information
Which part of the pharynx is not matched to its correct location?
A. laryngopharynx: where the pharynx opens into the larynx B. nasopharynx: where the nasal cavities open at the top C. oropharynx: where the sinuses open