If a scientist wanted to determine if a forest environment had been polluted, which of the following groups of organisms typically would be the best indicator for the presence of pollutants?
A. amphibians
B. insects
C. mammals
D. birds
E. fish
A
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The leukocyte that contains histamine is the
A. lymphocyte. B. monocyte. C. macrophage. D. basophil.
Which of the following scientist-discoveries is mismatched?
A. Watson, Crick, Wilkins, and Franklin-DNA structure. B. Avery, MacLeod, and McCarty-DNA is the genetic material. C. Meselson and Stahl-mechanism of DNA replication. D. Griffith-chromosomes.
Which of the following techniques was used to create the Flavr Savr tomato?
A) Gene knockout B) Transgenic technology C) RNAi D) Antisense RNA E) Stem cell technology
Fertilization in all animal species results in formation of a fertilization envelope which:
A. Prevents the zygote from dehydrating B. Prevents more sperm from fertilizing the same egg C. Permits the egg to implant in the uterine wall