a versatile plant compartment that may hold reserves of organic compounds or inorganic ions
A. lysosome
B. vacuole
C. mitochondrion
D. Golgi apparatus
E. peroxisome
B. vacuole
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An antigen-bearing pathogen that breaches normal flora surface barriers triggers __________ immunity. Fill in the blank(s) with the appropriate word(s)
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.
Chimpanzees and humans last shared a common ancestor about ____________ years ago
A. 1 to 2 million B. 6 to 7 million C. 10-11 million D. 6 to 7 billion
The large, ancient land mass that contained all the continents is known as ____
a. Laurasia b. Pangea c. Gondwana d. Atlantis e. Europa