In the flowering plant life cycle, into what
strucures do microspores directly develop?
a. male gametophytes
b. megaspores
c. sperm
d. zygotes
e. male sporophytes
A
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When the concordance rate of a trait is significantly higher in identical twins than it is in fraternal twins, we can conclude that:
A. the trait has a strong genetic component. B. the trait has a strong environmental component. C. the trait has a strong genotype-byenvironment interaction. D. the trait has a strong norm of reaction. E. the trait has both a strong genetic component and a strong norm of reaction.
Where in a prokaryotic cell is the genetic material found?
a. Nucleoid b. Nucleus c. Histones d. Nucleosome
Which of the following is NOT a feature associated with filtration?
A) nitrocellulose or plastic membrane filters B) sterilization of heat-sensitive materials C) varying thicknesses of membrane filters used D) use of HEPA filters to filter air E) ability of some filters to trap viruses and proteins
The organism that causes malaria is a
A. bacterium. B. virus. C. protist. D. worm. E. fungus.