The percentages of a population at different ages are known as the:a
growth rate.
b. age structure.
c. biotic potential.
d. density.
e. fecundity.
B
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One of the important outcomes of gastrulation is the establishment of cell tissue layers. What would be the outcome if gastrulation failed to occur?
A. Only skin and the digestive tract would develop. B. Only skin would develop. C. Only certain tissues, but not all, would develop, and the pregnancy would be nonviable. D. Only skin and muscle would develop.
The phase at the end of an action potential when the membrane potential becomes more negative than it is at rest is the ________ phase
A) threshold
B) depolarizing
C) repolarizing
D) hyperpolarizing
E) refractory
Which of the following organisms is commonly associated with biofilm formation in hospital settings?
a. bacillus cereus b. micrococcus lutes c. pseudomonas aeruginosa d. eschericia coli
In what kind of bonds are electrons are transferred between atoms