How many chromosomes and sister chromatids are shown in the cell indicated by the arrow?
1.one unduplicated chromosome, two chromatids
2.one duplicated chromosome, two chromatids
3.two unduplicated chromosomes, each with one chromatid
4.two duplicated chromosomes, each with two chromatids
2
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The production of an RNA molecule from the information in a DNA template molecule is referred to as ____
Some help with this one, please?
The plant hormone abscisic acid (ABA) is involved in the regulation of photorespiration. Based on this information, ABA likely plays a role in
A. cyclic photophosphorylation. B. the opening and closing of stomata. C. noncyclic photophosphorylation. D. the photoelectric effect.
Simon is experiencing chest pain due to an insufficient blood supply to the heart. Saul's coronary arteries are nearly blocked, which is slowing blood flow to his heart. Sean has just experienced the death of some of his heart muscle tissue. What do these men have in common?
A. Angina B. Atherosclerosis C. Heart attack D. Heart disease
The fossil evidence indicates that amphibians evolved from ________
Fill in the blank(s) with correct word