In which tissue would you look for cells that function in point-to-point communication?
a. connective.
b. epithelial.
c. muscle.
d. nervous.
c
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In eukaryotic cells, glycolysis occurs in:
A. the cytoplasm. B. the nucleus. C. the matrix of the mitochondria. D. the endoplasmic reticulum. E. vacuoles.
Scientists want to determine whether chemical X, a component of fertilizer, is harmful to fish. They treat fish in the
laboratory with increasing amounts of the chemical for one week and then measure their viability. What is the experimental variable for this experiment?
a. chemical X b. fish c. river d. farming e. water
Round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant to green seeds (y). A plant of unknown genotype is testcrossed to a true-breeding plant with wrinkled and green seeds. The offspring produced were 53 round and yellow, 49 round and green, 44 wrinkled and yellow, and 51 wrinkled and green. What is the likely genotype of the parent in question?
A. RRYY B. RrYY C. RRYy D. rryy E. RrYy
Shawfiq must have a benign tumor removed from his brain. The surgeon tells him that only local anesthesia will be administered as she cuts through Shawfiq's scalp and that he will remain conscious the whole time. Shawfiq is really nervous about this
because the brain seems to be a very sensitive area to have surgery on, particularly while he is wide awake. Explain to him why he shouldn't be so nervous. What will be an ideal response?