A co-evolutionary arms race is when a predator develops new traits in response to traits that have developed in their prey
If the Sierra newt produces a potent neurotoxin called
tetrodoxotoxin that causes paralysis in animals that consume them, then a co-evolutionary
response of their predators, the garter snake, might be:
A. adaptation to a different food source
B. developing the ability to produce a toxin
that kills the newt
C. increasing the speed at which the garter
snake can sneak up on the newt
D. developing resistance to tetrodoxotoxin
D
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A neuropeptide that functions as a natural analgesic is _____
A) acetylcholine B) epinephrine C) endorphin D) nitric oxide E) gamma-aminobutyric acid (GABA)
All cells have DNA to carry genetic information, a plasma membrane which serves as a selective barrier, and
mitochondria for the generation of energy.
Indicate whether the statement is true or false.Once in the respiratory tract, the flu virus targets cells based on specific glycoproteins on their surfaces. How does the virus gain entry into the target cell?
A. Viruses are made up of lipids and can therefore diffuse through the membrane of target cells, gaining entry. B. Glycoproteins within the virus structure bind with glycoproteins on the membrane of the target cell and the virus squeezes through the glycoprotein into the cell. C. The H spikes of the influenza virus break down the cell wall, allowing the virus to gain entry. D. The N spikes of the influenza virus help break down the plasma membrane of a cell, allowing entry of the virus into the cell.
What does alternation of generations mean in a plant life cycle?
A. Large plants have small offspring who grow to have large offspring. B. Mitosis is followed by meiosis in the life cycle. C. Both the haploid and diploid stages include a multicellular component. D. Spores and gametes are both multicellular.