What is the primary source of carbon for aquatic algae?
A. carbon dioxide
B. calcium carbonate
C. bicarbonate
D. carbon monoxide
E. calcium chloride
Answer: C
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Which of the following statements is NOT true about sister chromatids?
A. They are identical DNA sequences. B. They are attached to each other at a region of their DNA sequence called the centromere. C. They are formed in the S phase of the cell cycle when the chromosome undergoes replication. D. They are formed when the prokaryotic circular chromosome attaches at the plasma membrane. E. All of these statements about sister chromatids are false.
Describe the action of white blood cells that act as phagocytes
What will be an ideal response?
Sexual reproduction is important to the survival of a species in a changing environment because
A. sexual reproduction produces genetically variable individuals in the population. B. sexual reproduction requires less overall energy expenditure than asexual reproduction. C. sexual reproduction produces genetically identical individuals. D. All of the answer choices are correct. E. sexual reproduction requires only one individual to survive and produce germ cells.
A drop in blood volume would trigger the body to secrete
a. parathyroid hormones. b. somatotropin. c. antidiuretic hormones. d. insulin. e. glucocorticoids.