During which period of a pregnancy do the organ systems of the baby develop?
Answer: first trimester
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Immunodiffusion tests
A. allow detection of specific antigens. B. are a simple method that produces visible results in the zone of optimal proportion. C. allow quantitation of antigen concentrations. D. All of the choices are correct.
_____ can use energy directly from the environment(e.g. the sun), while _____ need to actively seek out their energy sources. (Hint: what are the most general categories of organisms that do each one?)
Select all apply: A. Autotrophs B. Heterotrophs C. Herbivores D. Omnivores E. Detritivores
A(n) ________ is a chemical that can be used to sterilize materials.
A. antiseptic B. oxidant C. disinfectant D. sterilant
Accidents during meiosis that can result in trisomies and monosomies are called
a. nondisjunctions. b. inversions. c. reciprocal translocations. d. recombinations. e. acrocentricities.