One of the drawbacks to using pheromones for communication is:
a. they are effective only at night.
b. they can only affect unrelated species.
c. they are toxic to unrelated species.
d. they require little energy for production.
e. they can transmit only a limited amount of information.
E
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Most nutrients are absorbed across the epithelium of the
A. colon. B. stomach. C. esophagus. D. small intestine. E. large intestine.
If meiosis did NOT occur in sexual
reproducing organisms,
a. growth of the zygote would be halted. b. mitosis would be sufficient. c. gametes would be haploids. d. the chromosome number would double each generation. e. eggs would be haploid, but sperm would be diploid.
Four of the five choices below are white blood
cells that are capable of circulating in the blood. Select the EXCEPTION.
a. neutrophil b. mast cell c. macrophage d. eosinophil e. dendritic cell
Because a newly synthesized DNA molecule contains ____, the replication process is said to be semiconservative
a. two new strands b. one parental strand and one new strand c. two parental strands d. half purines and half pyrimidines e. nucleotide