Trees that intentionally lose their leaves according to coordinated, seasonal schedules are:
A) thigmotropic. B) deciduous. C) sporophytes. D) gametophytes.
Answer: B
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A few bacteria are capable of growing on gases as the sole source of energy, carbon, and nitrogen. Which of the following combination of gases would support the growth of a bacterium in mineral media with NO other additions?
A) H2, N2, CO2 B) H2, O2, N2, CO2 C) H2, H2S, N2, CO2 D) H2, O2, N2O, CO2
Crossing over happens during which phase of meiosis?
What will be an ideal response?
If Andrew has indeed inherited the Huntington's allele from his mother, what are the chances that he could pass the allele to his children?
a. 1 in 4 (25%) b. 2 in 4 (50%) c. 3 in 4 (75%) d. 4 in 4 (100%)
Which enzyme is used in the synthesis of new eukaryotic genetic material?
A. DNA polymerase B. tyrosine C. RNA polymerase D. reverse transcriptase