Which of the following play some role in sewage treatment?
A. activated sludge
B. trickling filter
C. septic tank
D. lagooning
E. All of the choices are correct.
E. All of the choices are correct.
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A strain of bacteria containing F? factor genes is called a
A. monozygote. B. heterozygote. C. homozygote. D. merozygote. E. hemizygote.
Which pattern of diploid and haploid phases reflects the life cycle in plants?
a. alternation between haploid and diploid generations b. two haploid generations followed by a diploid generation c. one haploid generation followed by two diploid generations d. a single generation that limits the haploid state to gametes while the rest of the organism is diploid e. a single generation that limits the diploid state to gametes while the rest of the organism is haploid
Which type of chromosomal change occurs when a chromosome breaks and the broken part attaches to a different chromosome?
a. Inversion b. Duplication c. Translocation d. Deletion e. None of these choices.
Which phylum of vascular, seed-bearing plants includes pines, spruces, and firs?
a. Gnetophyta b. Cycadophyta c. Ginkgophyta d. Coniferophyta