Most enzymes are:
A) nucleic acids.
B) proteins.
C) lipids.
D) carbohydrates.
E) vitamins.
Answer: B
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Primary growth
a. occurs along the sides of stems. b. is dependent upon apical meristem. c. increases the diameter of older plants. d. is responsible for additions to woody parts. e. fits all of these descriptions
Predict what would happen if the pulmonary vein returned blood to the right atrium.
A. Abnormally high levels of oxygenated blood would be pushed into the systemic circuit. B. Oxygenated blood would be kept in a circular path between the heart and lungs-it would not reach the systemic circuit. C. Abnormally high levels of deoxygenated blood would be pushed into the systemic circuit. D. The expected cardiac cycle would occur-this is the normal path.
What characteristics does an organism have to possess to be a good genetic model?
What will be an ideal response?
Which of the following organelles is involved in the modification, packaging, and secretion of materials?
A. Mitochondria B. Centrioles C. Golgi apparatus D. Lysosomes