Which of the following, if used as a fertilizer, would be most immediately available for plant uptake?
A) NH3
B) N2
C) CN2H2
D) NO3-
E) amino acids
Answer: D
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Comparisons of human and mouse genomes reveals
A. they have widely different numbers of genes, and share only a few more genes than humans and pufferfish. B. the differences between humans and mice are mainly the introns. C. they have very little in common. D. the genomes are very similar, with most of the genes unique to mice linked to size and shape. E. the genomes are very similar, with most of the genes unique to mice linked to smell and reproduction.
Plant activities that follow a biological clock so that they are based on cycles of about 24 hours are ____
a. gravitropisms
b. photoperiodisms c. thigmotropisms d. circadian rhythms e. phototropisms
Mutated versions of one or both of the genes BRCA1 and BRCA2 are associated with an increased risk of ________
a. breast cancer only b. lung cancer and pancreatic cancer c. both breast cancer and ovarian cancer d. lymphoma only
A gene for the MN blood group has codominant alleles M and N. If both children are of blood type M, which of the following is possible?
A) Each parent is either M or MN. B) Each parent must be type M. C) Both children are heterozygous for this gene. D) Neither parent can have the N allele.