If a female fruit fly is heterozygous and carries one allele for white eyes and one allele for red eyes, her mutant allele and her nonmutant allele will segregate during meiosis I
A. true
B. false
A
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Primary and secondary xylem that can no longer transport water and solutes, but can store defensive compounds, is
called ____.
a. bark b. heartwood c. vascular cambium d. sapwood e. secondary epidermis
Which of the following is a pair of agents that both puncture the membranes of foreign bacteria?
A. Macrophages and helper T cells B. MAC and killer T cells C. Antibodies and killer T cells D. Antibodies and plasma cells E. MAC and plasma cells
What is the difference between mitochondria and chloroplasts?
A. Mitochondria are oxidative metabolic bacteria derivatives and chloroplasts are photosynthetic bacteria derivatives. B. Mitochondria have linear strands of DNA and chloroplasts have rings of DNA. C. Mitochondria have three membranes and chloroplasts have two membranes. D. Mitochondria produce oxygen and chloroplasts produce carbon dioxide.
The Vienna Convention for the Protection of the Ozone (1985) and the Montreal Protocol (1987) included agreements for the phasing out of:
A) nuclear weapons. B) synthetic pesticides. C) chlorofluorocarbons. D) emissions of carbon dioxide. E) smelting of heavy metals.