In C3 plants, the __________ are typically closed at night and open during the daytime to allow for gas
exchange.
a. stomata
b. epidermis
c. spongy mesophyll
d. grana
e. cuticles
A
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Which type of receptor is involved in rapid responses of muscle cells and neurons? (Select all correct choices.)
A. G protein-coupled receptor B. receptor kinase C. ligand-gated ion channel D. nuclear receptor
The process whereby one species gives rise to several others that exploit different features of the environment is known as
A) exponential growth. B) coevolution. C) adaptive radiation. D) competition.
The attachment point of a muscle to a bone that can move is called the ________
A) origin B) insertion C) synergistic D) antagonistic
A cell contains a higher concentration of a substance than its surrounding environment. The cell membrane is highly permeable to this substance. What will happen as a result of diffusion?
A) The cell membrane will keep the substance inside the cell. B) The cell membrane will allow the substance to move to the cell's environment. C) The cell membrane will use the process of active transport to take in more of the substance. D) The cell membrane will allow more of the substance to enter the cell.