According to the theory of evolution, those best adapted to the environment will _____
a. survive and reproduce
b. not survive
c. produce offspring that are genetically identical to the parents
d. have lower fertility rates
e. have fewer offspring on average
a
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Bladders on kelp function to anchor the thallus to the substrate
Indicate whether the statement is true or false
The fluid nature of the membranes is attributed to a lateral movement of
A. pumps such as the proton pump. B. phospholipid molecules. C. the entire lipid bilayer. D. antigen molecules. E. protein channels.
When an animal cell is placed in a hypotonic solution and water enters the cell via osmosis, the volume of the cell increases until it bursts. This does not happen to plant cells, because _____.
a. certain gated channel proteins embedded in their plasma membranes open as osmotic pressure decreases, allowing excess water to leave the cell b. they have cell walls, which prevent the entry of water by osmosis c. they have large central vacuoles, which provide abundant space for storage of incoming water d. they have cell walls, which provide pressure to counteract the pressure of the incoming water
The substances that donate electrons to the electron transport chains of chemolithotrophs are ________.
A. lipids B. methane gas and alcohols C. carbohydrates D. inorganic compounds