In a survivorship curve, a type III species, like most insects and plants, is a species that has
A. a strong possibility of becoming extinct in a relatively short period of time.
B. an equal probability of dying at any age.
C. an extremely long life span.
D. the highest probability of dying at a very young age.
E. the highest probability of dying as it reaches its maximum life span.
D. the highest probability of dying at a very young age.
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Persons infected with HIV often die of opportunistic diseases because
A. HIV can transduce other viruses into virulent strains. B. HIV destroys T cells. C. HIV binds to antibodies. D. HIV is a retrovirus. E. HIV mutates easily.
In females, meiosis II is completed ____
a. before birth b. at the time of birth
c. when eggs are ovulated each month d. at puberty e. only if the egg is fertilized
The part of a mollusc's body that is responsible for secreting a shell is the: a. mantle
b. nephridium. c. head-foot region. d. visceral.
Which human activity is NOT a threat to biodiversity?
A) Application of synthetic fertilizers B) Importing pigs and goats in Hawaii for food C) Cattle ranching D) Building a large sugarcane plantation in a tropical rain forest E) No-till farming