What is the role of the fungus in a mycorrhizal association?
A) contribution to photosynthesis
B) absorption of water, phosphate, and other minerals
C) secretion of growth factors
D) release of water
Answer: B
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Describe how syntrophy helps explain why certain enrichments yield consortia and never an individual species
What will be an ideal response?
In plant cells, chloroplasts are found ____
a. on the cell membrane b. in the cytoplasm of the cell c. in the stroma d. in the thylakoids e. in the central vacuole
In certain Native American groups, albinism due to a homozygous recessive condition in the biochemical pathway for melanin is sometimes seen. If the frequency of the allele for this condition is 0.06, which of the following is closest to the frequency of the dominant allele in this population?
A. 0.04 B. 0.06 C. 0.16 D. 0.36 E. 0.94
Chancroid is the sexually transmitted disease caused by:
a. H. influenzae. b. Haemophilus ducreyi. c. H. aphrophilus. d. Haemophilus parainfluenzae.