The structure where parts of ribosomes form before passing into the cytoplasm is the ____
a. nucleus
b. nuclear membrane
c. Golgi body
d. nucleolus
e. chromosome
ANSWER: d
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When you are jogging, your muscles are using more oxygen and releasing more carbon dioxide into the blood than when you are at home on the couch. Which of the following would occur during your jog?
A) Blood pH would become more basic. B) The concentration of bicarbonate ions (HCO3-) in the blood would decrease. C) The medullary respiratory center would detect rising carbon dioxide levels. D) The volume of the dead air space would decrease.
To test the effect of vitamin D on growth, two groups of rats were raised under identical conditions and fed the same diet. One of the groups received daily injections of vitamin D
The other group received injections of saline, which did not contain vitamin D. All the rats were weighed weekly for 2 months. In this experiment, the control was the A) average weight gain of the rats. B) 2-month period of time. C) group receiving vitamin D. D) group receiving saline.
Figure 11.5
This illustration shows _________________.
A. cytoplasmic division in a plant cell B. cytokinesis via a contractile ring mechanism C. how chromosomes are dragged to the poles D. chromosome condensation E. an animal cell in interphase
Some species of cyanobacteria can fix atmospheric nitrogen.
Answer the following statement true (T) or false (F)