In corn and other monocots, a rigid sheath called a __________ surrounds and protects the plumula.
A. coleoptile
B. anatomy
C. hypocotyl
D. radicle
E. sporophyte
Answer: A
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The difference between a single nucleotide polymorphism (SNP) and a point mutation is that:
A. a point mutation becomes permanently incorporated into the genome, whereas a SNP does not. B. a SNP becomes permanently incorporated into the genome whereas a point mutation does not. C. a point mutation can be corrected by various repair mechanisms, whereas a SNP cannot. D. a SNP can be corrected by various repair mechanisms, whereas a point mutation cannot. E. a point mutation is when a base pair is changed to a different base pair, whereas a SNP is when the base pair differs among individuals in a population.
A hormone binds a receptor and activates the cAMP signal transduction pathway ultimately leading to the cell response. Which of the following is NOT a likely mechanism for reversing (or shutting off) cAMP transduction?
A. The hormone dissociating from the receptor. B. The GTP on the alpha subunit of the G protein is hydrolyzed to GDP. C. Activate phosphodiesterase. D. Activate adenylyl cyclase. E. Protein phosphatases remove phosphates from proteins initially activated by protein kinase A.
Which of the following lists the structures of the female reproductive tract in the proper order from sperm entry to fertilization?
A. cervix, vagina, uterus, oviduct B. vagina, uterus, oviduct, ovary C. vagina, cervix, uterus, oviduct D. endometrium, cervix, uterus, oviduct E. ovary, oviduct, uterus, vagina
Inbreeding is usually beneficial to a population because it increases genetic diversity
Indicate whether the statement is true or false