Gymnosperms and angiosperms share multiple similarities. Which of the following is NOT a shared feature of angiosperms and gymnosperms?
A) Both produce flowers.
B) Both have pollen grains that are male gametophytes.
C) Both have a dominant sporophyte generation.
D) Both have seeds.
A
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The step of translation in which amino acids are added to the growing polypeptide is
mitosis. initiation. elongation. termination. transcription.
In addition to highly repetitive and unique DNA sequences, a third category of DNA sequences exists. What is it called, and which types of elements are involved in it?
A) dominant DNA; euchromatin and heterochromatin B) multiple gene family DNA; hemoglobin and 5.0S RNA C) permissive DNA; centromeres and heterochromatin D) moderately repetitive DNA; SINEs, LINEs, and VNTRs E) composite DNA; telomeres and heterochromatin
Which description applies to a population that's exhibiting exponential growth?
A) It will have growth proportional to the current total. B) It shows a decreased growth rate over time. C) It doubles every year. D) It has as many individuals being born as are dying.
Totipotent nuclei are capable of:
a. controlling the expression of other genes in the nucleus. b. directing normal development of an organism. c. causing cells to lose the ability to differentiate. d. undergoing unlimited nuclear divisions. e. stopping the cell cycle at will.