When the proteins pull the sister chromatids to the center it is called what?
What will be an ideal response?
Answer: Metaphase
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Sulfur occurs in all living matter primarily as a component of
A. fatty acids. B. nucleotides. C. amino acids. D. carbohydrates
A plant lacking this macronutrient is likely to be deficient in which step of root nodule development?
A. Calcium; flavonoid release B. Phosphorus; development of infection threads C. Calcium; curling of root hairs around rhizobia D. Phosphorus; curling of root hairs around rhizobia
If a stretch of human double stranded DNA contains 47% G + C, then
a. it contains 47% A + T b. there are more pyrimidines than purines c. there are more purines than pyrimidines d. it contains 53% A + T e. there are no genes in this stretch of DNA
What is the definition of osmosis?
A) The movement of molecules down their concentration gradient B) The movement of salt molecules across a semipermeable membrane C) The diffusion of water molecules across a semipermeable membrane D) The movement of molecules against their concentration gradient