The embryo is now called the fetus.
Choose the letter of the best match:
A. third trimester of pregnancy
B. second month of pregnancy
C. first month of pregnancy
D. second trimester of pregnancy
E. third month of pregnancy
D. second trimester of pregnancy
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Which of the following complex carbohydrates is listed with its correct function?
a. Starch: primary energy-storage molecule in animals b. Amylose: main component of plant starch c. Cellulose: structural component of plant cell walls d. Chitin: constituent of bacterial cell walls
Which of the following act at the post-translational stage to regulate expression of a gene?
A: Alternative splicing of exons. B: Targeted degradation of the mRNA C: Phosphorylation of a protein. D: B and C. E: A and C. F: All of the above.
Stamens and carpels are, in fact, modified sporangia-bearing leaves.
Answer the following statement true (T) or false (F)
Which of the following best illustrates the concept of supply and demand in cells?
a. The rate at which food molecules are oxidized by cellular respiration is tightly controlled such that the rate of ATP generation does not match the requirements of the cell for chemical energy. b. The rate at which food molecules are reduced by cellular respiration is tightly controlled such that the rate of ATP generation matches the requirements of the cell for chemical energy. c. The rate at which food molecules are oxidized by cellular respiration is tightly controlled such that the rate of ADP generation matches the requirements of the cell for chemical energy. d. The rate at which food molecules are oxidized by cellular respiration is tightly controlled such that the rate of ATP generation matches the requirements of the cell for chemical energy.