Do mycorrhizal symbioses occur between fungus and non-photosynthetic plants?
A. Yes; non-photosynthetic plants also need minerals.
B. No; non-photosynthetic plants cannot provide organic compounds to fungi.
C. No; non-photosynthetic plants do not need phosphate.
D. Yes; non-photosynthetic plants can generate organic compounds without photosynthesis.
B. No; non-photosynthetic plants cannot provide organic compounds to fungi.
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The publication of the CDC that reports new cases of reportable infectious diseases is titled
A. Morbidity and Mortality Weekly Report (MMWR). B. State Health News Letter (SHNL). C. Federal Report of Infectious Disease (FRID). D. National Morbidity Weekly.
Suppose the experiment of Meselson and Stahl was performed on a sample of 8 cells, each containing one copy of its circular double-stranded DNA genome, and that had been growing on normal 14N medium. You then grew the cells for 3 generations in medium containing 15N. The outcome would be
A) 8 cells with single-stranded DNA molecules with 14N, and 24 cells with single-stranded DNA molecules with 15N. B) 16 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 48 cells with double-stranded DNA molecules with 15N. C) 8 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 24 cells with double-stranded DNA molecules with 15N. D) 8 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 32 cells with double-stranded DNA molecules with 15N. E) 65 cells with single-stranded DNA molecules with 15N.
If cells had single-layer membranes like micelles, how would the structures of transmembrane proteins be affected?
A) transmembrane proteins would only possess hydrophilic regions B) transmembrane proteins would possess a hydrophilic region in the cell interior and a hydrophobic region in the extracellular space C) transmembrane proteins would only possess hydrophobic regions D) transmembrane proteins would possess a hydrophobic region in the cell interior and a hydrophilic region in the extracellular space E) the structures of transmembrane proteins would remain the same as if cells had lipid bilayers
In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls flower color. The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a tall plant with white flowers produces 3/8 tall purple, 1/8 tall white, 3/8 dwarf purple, and 1/8 dwarf white. What is the genotype of the parents?
A. Dd Pp x Dd pp B. Dd Pp x Dd Pp C. DD Pp x dd Pp D. Dd pp x dd Pp E. DD Pp x dd pp