Variation among individuals that is due to factors other than genetic factors is called ________
A) phenotypic variation
B) environmental variation
C) broad-sense heritability
D) narrow-sense heritability
B
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Some organisms are not able to live in an environment where there is oxygen; these types of organisms
are called obligate anaerobes. Which of the following proposals is the most likely for how they survive without oxygen?
a. They are able to survive using less energy than aerobes. b. All of their ATP is imported into the cell from an external source. c. Sulfur is used instead of oxygen because it is chemically similar. d. These organisms use photosynthesis to produce energy. e. Their mitochondria are damaged, and consequently they are short-lived.
The similarity in appearance between bees and wasps is an example of ________
a. competitive exclusion b. interspecific competition c. mutualism d. mimicry e. resource partitioning
In summer, when plant roots are converting sugar to store as starch, the root is the sugar ________ and the leaves are the sugar ________
A) source; source B) sink; sink C) source; sink D) sink; source or sink E) sink; source
Consider the following food chain: hawk - rabbit - clover. Each species will contain a different amount of calories in its body (clover: 10 calories, rabbit: 500, and hawk: 1200). Each species has a different daily caloric requirement (clover: sunlight, rabbit: 100 calories, hawk: 300). How many clover plants, per day, does it take to support one hawk?
A. approximately 30 clover plants B. approximately 600 clover plants C. approximately 60 clover plants D. approximately 3 clover plants E. None, clover plants do not support hawks.