Gas exchange in the aquatic salamander known as the axolotl is correctly described as
A) active transport to move oxygen into the salamander from the water.
B) carrier-mediated transport to move oxygen into the salamander from the water.
C) facilitated diffusion of carbon dioxide from the salamander into the water.
D) simple diffusion of oxygen into the salamander from the water.
E) active transport of carbon dioxide from the salamander into the water.
Answer: D) simple diffusion of oxygen into the salamander from the water.
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Female sand crickets are known to produce two phenotypic variants: long-winged and short-winged. Moreover, these two variants have been shown to allocate different amounts of their energy budget to flight or ovary development, respectively
The development of female crickets into one or the other of these variants is due to ________. A) genetic mechanisms B) developmental mechanisms C) physiological mechanisms D) All of the above.
What disease has the AAV vector cured in rhesus monkeys?
A. cystic fibrosis B. muscular dystrophy C. anemia D. retinal degenerative disease E. All of the choices are correct.
Spikes are glycoproteins of the virus capsid.
Answer the following statement true (T) or false (F)
The closest algal relatives of land plants are _______.
A. charophyceans B. red algae C. brown algae D. angiosperms