The chemical composition of urine reflects the processes of
A. filtration.
B. reabsorption.
C. secretion.
D. concentration.
E. All of the answer choices are correct.
E. All of the answer choices are correct.
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During a year, plants never use 100% of the incoming solar radiation for photosynthesis. What is a reasonable explanation for this?
I) Plants cannot photosynthesize as well during winter (in cold winter climates). II) Plants cannot photosynthesize as well on cloudy days. III) The pigments that drive photosynthesis respond to only a fraction of the wavelengths that are available. A) only I B) only II C) only III D) only II and III E) I, II, and III
In the photosystem I reaction center, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called
A. P680. B. P700. C. chlorophyll I. D. chlorophyll II. E. retinal.
Which of the followings statements concerning the preprophase band is false?
a. It appears just prior to mitosis. b. It helps orient the mitotic spindle. c. It determines the plane of cell division d. It is found in both plant and animal cells. e. It is composed of microtubules.
It is believed that eukaryotes evolved their mitochondria from a symbiotic relationship with a free-living aerobic bacteria.
Answer the following statement true (T) or false (F)