Which term is another name for the birth canal?
a. oviduct
b. vulva
c. uterus
d. vagina
Answer: d. vagina
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Contrast prokaryotic and eukaryotic regulation of gene expression
What will be an ideal response?
The addition of excess phosphorous causes lakes to become eutrophic because the nutrients trigger
blooms of photosynthetic cyanobacteria. Why do these blooms cause low oxygen levels in lakes?
a. Cyanobacteria use up more oxygen than they produce. b. Excess phosphorous binds to dissolved oxygen in the water. c. Cyanobacteria are net producers of oxygen while alive, but when they die aerobic bacteria use oxygen while decomposing them. d. Cyanobacterial blooms only occur in waters naturally low in oxygen. e. Cyanobacteria are aerobic heterotrophs, consuming oxygen and producing carbon dioxide.
If meiosis did NOT occur in sexually reproducing
organisms, a. growth of the zygote would be halted. b. mitosis would be sufficient. c. gametes would be haploid. d. the chromosome number would double in each generation. e. eggs would be haploid, but sperm would be diploid.
The brain can infer the pitch of a sound from the:a
number of hair cells that are stimulated. b. particular hair cells that are stimulated. c. intensity with which the hair cells are stimulated. d. intensity of the action potential produced by the stimulated hair cells. e. fluid movements of the semicircular canals.