What type of genetic recombination results from the mating of two strains of bacteria F+ and F-?
a. transposition
b. plasmid genetic recombination
c. conjugation
d. histone genetic recombination
Ans: b. plasmid genetic combination
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Which of the following is not a characteristic of temperate deciduous forests?
A. The are located south of the equator. B. They consist of trees that shed their leaves in autumn. C. They have warm summers and cold winters. D. The animal population consists of herbivores and carnivores. E. Most of the animals adjust to changing seasons but some migrate.
In decomposition, fungi generally
A) extend hyphae to invade litter and excrete hypha. B) break down litter through shredding. C) consume microbivores on tissues. D) gain energy directly through photosynthesis.
What are the smallest units into which an element can be broken down?
What will be an ideal response?
Which of the following statements about natural selection are true?
A) Directional selection occurs when one extreme phenotype in the population is favored. B) Stabilizing selection favors all phenotypes equally. C) Disruptive selection favors two extreme phenotypes. D) Directional selection is most common in stable environments.