One of the problems associated with the control of virus-caused diseases is that they
A. cannot survive outside the host.
B. have a complicated life cycle.
C. have a rapid mutation rate.
D. can infect many kinds of cells in many kinds of organisms.
C. have a rapid mutation rate.
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Which of the following describes fission?
a. An organism splits into two separate organisms. b. Fertilized eggs develop outside the female’s body. c. A new organism forms and breaks away from the adult. d. An egg develops into an individual without being fertilized.
Explain how the composition and distribution of codons among living organisms provide evidence for evolution from
a common ancestor. What will be an ideal response?
Sclereids are cells that:a
are found in wood and bark. b. conduct water and dissolved minerals. c. are usually found in nut shells and pits of stone fruits. d. conduct dissolved sugars. e. form cytoplasmic connections between cells.
Oil pollution is a serious problem throughout the world. Petroleum kills organisms by:
A) disrupting biological membranes. B) coating surfaces of organisms. C) both of the above.