Plant viruses ________
A) often use RNA, rather than DNA, as their genetic material
B) benefit plants, rather than causing disease
C) cause diseases that can be easily cured
D) do not exist, as viruses attack only animals
A
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Which of the following is a characteristic of underdeveloped countries?
a. high birth rates b. zero population growth c. high percentage of older individuals d. low percentage of young individuals
The physical, chemical and biological conditions a species needs to survive and reproduce is a(n) ____
a. meta-community b. habitat c. biome d. ecosystem e. niche
During which of the following stages of meiosis does the cell contain the LEAST amount of DNA?
A. telophase II B. prophase II C. anaphase I D. prophase I
Which statement comparing spermatogenesis and oogenesis is true?
A) During oogenesis, four cells are produced with each sharing equally the cytoplasm from the parent cell. B) Men, but not women, can produce gametes throughout their adult lives. C) Spermatogenesis and oogenesis rely upon mitosis to produce gametes. D) Spermatogenesis, but not oogenesis, is an example of gametogenesis.