Specialized symbiotic associations between the roots of plants and fungi are called
A. lichens.
B. hyphal associations.
C. heterokaryotic junctions.
D. mycorrhizae.
E. a mycelial unit.
D. mycorrhizae.
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Which of the following is not a characteristic of Saccharomyces cultures?
a. The cells are haploid. b. The cells have a relatively short generation time. c. Cells reproduce asexually by budding. d. The cells can be induced to reproduce sexually. e. All answers are true of Saccharomyces cultures.
Huntington’s disease is a dominant autosomal
genetic disorder. Albert has Huntington’s disease as did his mother. His father was normal. Albert is married to Lydia who does not have Huntington’s disease. If Albert and Lydia have a child, what is the probability that their child will have Huntington’s disease?
a. 0% b. 25% c. 50% d. 75% e. 100%
The F2 offspring of a classic Mendelian monohybrid cross between homozygous dominant and homozygous recessive parents would produce the genotype(s)
A. AA, Aa, and aa. B. Aa and aa. C. AA only. D. AA and Aa. E. Aa only.
Which portion of the brain is responsible for primitive emotions such as fear, rage, and sexual desire?
A) Thalamus B) Pons C) Medulla D) Reticular formation E) Limbic system