An area with many endemic species, some of which are disappearing.
A. hotspot
B. habitat loss
C. edge effects
D. megafaunal extinction
E. extinction vortex
A. hotspot
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Muscle contraction occurs in a cyclic process. Which of the following sequences is in the correct order?
A) power stroke, cross bridge formation, cross bridge dissociation, cocking of myosin B) cross bridge formation, power stroke, cross bridge dissociation, cocking of myosin C) cross bridge formation, cocking of myosin, power stroke, cross bridge dissociation D) cross bridge formation, cross bridge dissociation, cocking of myosin, power stroke E) cross bridge formation, power stroke, cross bridge dissociation, power stroke, cocking of myosin
Which of the following involves removing introns and reconnecting exons in a pre- mRNA?
a. splicing b. encoding c. translating d. elongation
Which of the following is not a characteristic of mammals?
A. They have a two-chambered heart. B. They have an amnion. C. They have a skeletal system composed of bone. D. They have lungs. E. They are endothermic.
The carrying capacity of the Earth for humans is influenced by
A. food and energy supply. B. disposal of waste products. C. interaction with other organisms. D. All of these answers are true.