When the reproductive cells of different species are incompatible and cannot accomplish fertilization, it is referred toas:a
hybrid sterility.
b. gametic isolation.
c. gametic breakdown.
d. temporal isolation.
e. behavioral isolation.
b
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Sensitization is a type of memory where increased responsiveness to mild stimuli occurs after
experiencing a strong stimulus.
Indicate whether the statement is true or false.If food-borne disease transmission requires ingestion of the pathogen, followed by growth of the organism, and release of toxins in the intestine it is referred to as a food-borne ________.
Fill in the blank(s) with the appropriate word(s).
Compared to mammals and reptiles, what characteristic prevents amphibians from surviving far from water?
A. Their limbs are too weak to support their weight on land. B. Their cartilaginous endoskeleton would dry out on land. C. They do not have any lungs and cannot breathe out of the water. D. Their eggs do not have an amnion to prevent them from drying out.
Why are mycorrhizal fungi superior to plants at acquiring mineral nutrition from the soil?
A) Hyphae are one hundred to one thousand times larger than plant roots. B) Hyphae have a smaller surface-area-to-volume ratio than do the hairs on a plant root. C) Mycelia are able to grow in the direction of food. D) Fungi secrete extracellular enzymes that can break down large molecules.