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Questions in biology

[Answered] What substance(s) cause(s) the ovaries and testes to greatly increase their production of estradiol and testosterone? A. human growth hormones B. follicle-stimulating hormones C. gonadotropin-releasing hormone D. cortisol

[Answered] Which of the following statements best describes the role of glucose during photosynthesis? A. It reacts with water. B. It is a product formed. C. It reacts with carbon dioxide. D. It is converted into light energy.

[Answered] Provide an example of an adaptation and explain how it helps an organism survive.

[Answered] Which of the following is the fourth basic step to genetically modify a cell? A) transformation B) ligation C) plasmid cleavage D) isolation of gene E) restriction-enzyme digestion of gene

[Answered] Eukaryotic chromosomes are circular and are usually found in pairs. True or False?

[Answered] Which of the following statements is true? a. The nitrogen cycle is the most important cycle for life. b. The oxygen cycle is the least important cycle for life. c. Life can be sustained without any of the cycles for life present. d. All cycles of matter are equally important for life to be sustained.

[Answered] Why are there fewer organisms at the top of the food chain? A. There are fewer organisms at the top because they are bigger. B. There are fewer organisms at the top because they are predators. C. There are fewer organisms at the top because some energy is lost in every energy transfer. D. There are not fewer organisms at the top of the food chain.

[Answered] A. Spermatogenesis and oogenesis are terms used to describe gametogenesis. B. implantation. C. mating. D. meiosis. E. mitosis.

[Answered] Which of the following is the best way to genetically modify a cell? A) transformation B) ligation C) plasmid cleavage D) isolation of gene E) restriction-enzyme digestion of gene Which of the following enzymes converts RNA into DNA? A) DNA polymerase B) ligase C) RNA polymerase D) reverse transcriptase If you put a gene in a virus, the next step in genetic modification would be A) insertion of a plasmid B) transformation C) transduction D) PCR

[Answered] The end products of many metabolic reactions have a neutral pH, so it is important that intracellular fluid brings the cellular pH back down to an acidic level. True or False?