Monocots and eudicots diverged about:
A. 500 million years ago
B. 125 million years ago
C. 60 million years ago
D. 10 million years ago
E. very recently
B. 125 million years ago
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When a male lion competes with another male for mating rights in a pride, this is an example of _________________. When a lion pride competes with hyenas for food sources in a habitat, this is an example of ________________
Both can affect the size of the lion population. A. intraspecific competition; interspecific competition B. interspecific competition; intraspecific competition C. contraspecific competition; intraspecific competition D. intraspecific competition; contraspecific competition E. interspecific competition; contraspecific competition F. contraspecific competition; interspecific competition
False ribs are also known as
A) vertebral ribs. B) vertebrochondral ribs. C) vertebrosternal ribs. D) floating ribs. E) both vertebrochondral ribs and floating ribs.
There is a population of frogs living in a pond, 25 are green, 25 are brown, 25 are yellow with green spots and 25 are all yellow. A drought occurred and 75% of the frogs died. The remaining frogs were green and brown, after 25 generations the frogs still were green and brown, yellow frogs never appeared in the population again. Which of the following best explains this phenomenon?
A. Sexual selection. B. Balancing selection. C. Bottleneck effect. D. Heterozygote advantage. E. Founder effect.
If birds with larger beaks are favored by the environment, it is likely that ________ selection will occur
A) directional B) disruptive C) stabilizing D) standardizing