A country's ecological footprint can be calculated by multiplying its population size by the footprint of each individual. Why are some ecologists concerned about the ecological footprint of a country like India
A. Its population is increasing.
B. Its standard of living and land area are increasing.
C. Its population and land area are increasing.
D. Its standard of living is increasing.
E. Both its population and standard of living are increasing.
E. Both its population and standard of living are increasing.
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Based on the phylogenetic tree shown, which of the following is a correct statement of evolutionary relationships?
A. A snake is equally related to a bird and a crocodile. B. A snake is more closely related to a crocodile than to a turtle. C. A snake is more closely related to a crocodile than to a bird. D. A snake is more closely related to a bird than to a crocodile. E. A snake is more closely related to a frog than to a human.
When cells stop responding to normal controls
over growth and division they a. begin to form a tumor. b. produce a malignancy. c. start to die. d. kill surrounding cells. e. produce scar tissue
Where does fertilization of the egg normally occur?
A. abdominal cavity B. ovary C. vagina D. oviduct E. fimbria
In a germ-line cell from a human male that is dividing, when do the X and Y chromosomes segregate?
A. during meiosis II, anaphase B. just before meiosis begins C. during meiosis I, anaphase D. They do not segregate; gametes contain a copy of X and a copy of Y. E. during mitosis