Which component is part of the axial skeleton?
a. Ribs
b. Arms
c. Legs
d. Shoulder girdle
e. Pelvic girdle
a
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Photosynthesis is the pathway used to synthesize carbohydrates from
A. sunlight. B. carbon dioxide. C. oxygen.
Muscle contraction does not shorten the muscle filaments (myosin and actin). How then, does a contraction produce tension?
What will be an ideal response?
Two sister chromatids are held together at the
A. autosome. B. telomere. C. centromere. D. spindle. E. aster.
Nitrogen is a growth-limiting nutrient for many organisms because
A. it is necessary for the biosynthesis of amino acids. B. it is required for synthesis of nucleotides. C. it is required for lipid synthesis. D. only a small number of bacteria are able to extract it from the atmosphere. E. only a few microbes can extract it from the atmosphere, but all organisms require it for amino acid and nucleotide synthesis.