Erythrocytes play a role in which of the following?
a. Transporting O2
b. Transporting CO2
c. Buffering blood pH
d. All of the listed responses are correct.
e. None of the listed responses is correct.
Answer: d. All of the listed responses are correct.
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Which of the following features distinguishes all hormones from neurotransmitters?
A. Hormones require large concentrations to have an effect, while neurotransmitters require only low concentrations. B. A hormone affects reproductive functions, while neurotransmitters control all other processes. C. Hormones travel via the blood to a target tissue, while neurotransmitters cross the synaptic cleft to a postsynaptic cell. D. Hormones are steroids, while neurotransmitters are amino acids.
The photo below of Australian sawfly caterpillars is used as an example of:
1.Colonial living
2.Pheromone signaling
3.Social defensive behavior
4.Polygamous mating systems
Which of the following is a type of reproductive
isolating mechanism? a. temporal isolation b. mechanical isolation c. behavioral isolation d. ecological isolation e. all of these
Which of the following organisms has cell walls containing silica?
A. Ciliated protozoa B. Archaea C. Diatoms D. Dinoflagellates