All of the following are goals of conservation
biology EXCEPT
a. to investigate the evolutionary and ecological
origins of biodiversity.
b. to survey the range of biodiversity.
c. to determine if loss of any specific species
would be detrimental to mankind.
d. to identify ways to maintain and use biodiversity
to help man.
e. all of these are true.
Answer: c
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Viruses use the host's machinery to make copies of themselves. However, some human viruses require a type of replication that humans do not normally have
For example, humans normally do not have the ability to convert RNA into DNA. How can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? A) The virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles. B) The viral genome codes for specialized enzymes not in the host. C) The virus infects only those cells and species that can perform all the replication roles necessary. D) Viruses can stay in a quiescent state until the host cell evolves this ability.
Fitness is a measure of reproductive success. If an individual with genotype BB produces 6 offspring, and a heterozygous individual (Bb) produces 10 offspring, and a third individual with genotype bb produces 5 offspring, what is the fitness value for the individual with BB genotype?
A. 1.0. B. 0.5. C. 0.6. D. 0.4. E. 1.1
Aquaporins are ____
a. pores made of water molecules b. required for water to enter a cell c. found only in bacterial cells d. specific channels for water transport e. useful for cell signaling
What type of acquired immunity is obtained when a snake bite victim is given anti-venom?
a) natural active b) natural passive c) artificial active d) artificial passive