How many chromosomes are in a human gamete?
A) 23 B) 46 C) 26 D) 42 E) 43
Answer: A
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What would happen to an egg that had a non-functional chorion?
A. The embryo would suffocate or dehydrate. B. The embryo would starve in the egg. C. The embryo would die due to high levels of toxic metabolic wastes. D. The embryo would develop normally. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about the amniotic egg? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
During the elongation stage of transcription ____
a. DNA nucleotides are added to the transcript b. the transcript grows in the 5'®3' direction c. transcription factors recruit RNA polymerase to the template strand
d. the double helix remains single-stranded after being used as a template e. RNA polymerase binds to the promoter region
The heart, muscles, bones, and blood develop primarily from
a. ectoderm. b. mesoderm. c. endoderm. d. the placenta. e. the gray crescent.
What is the function of the plasma membrane in a photosynthetic eukaryotic cell?
A) It converts carbon dioxide and water into sugars. B) It isolates the cell's contents from the external environment. C) It controls protein synthesis in the cell. D) It recycles old extracellular material.