In a typical human body (somatic) cell, how many total chromosomes are there?
A) 23 B) 46 C) 1 D) 2
B
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Which of the following is a function of an exoskeleton?
A. Exoskeletons provide protection. B. Exoskeletons help reduce water loss in terrestrial species. C. Exoskeletons provide support. D. Exoskeletons provide a site for muscle attachment. E. All of the answer options are correct.
Which of the following is not an adaptation of conifers to dry or cold conditions?
A. conical shape of tree B. scalelike or needle-shaped leaves C. flexible branches D. waxy cuticle E. production of resin
Which of the following is the traditional source of most oils?
a. single-celled algae b. crop plants c. multicellular algae d. any plants
What is the role of pyruvic acid in fermentation?
a. It becomes the final electron acceptor for the electron transport chain in the absence of oxygen. b. It takes the electrons from NADH, oxidizing it back into NAD+. c. It provides the protons to be used in the electron transport chain. d. It is the organic acid end-product of fermentation.