Carotenoids are important to many plants because these pigments are able to:
A. remove carbon dioxide from the air
B. absorb violet and blue-green wavelengths of light that are not absorbed by chlorophyll
C. absorb water so that hydrolysis can be carried out in the chloroplasts
D. store electrons for use during the "dark" reaction of photosynthesis
E. capture UV radiation that is harmful to the DNA in the nucleus of plant cells
Answer: B
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For the hierarchy of skeletal muscle organization, which accurately lists the order of structures from "small" to "big"?
A. sarcomere, myofibril, muscle fiber, motor unit B. myofibril, muscle fiber, sarcomere, motor unit C. motor unit, myofibril, muscle fiber, sarcomere D. motor unit, sarcomere, muscle fiber, myofibril E. None of the choices are correct.
Which sort of interaction is harmful to one species but beneficial to the other? What will be an ideal response?
Secreted in breast milk, what class of antibody helps protect the newborn through neutralization and agglutination of antigen?
A) IgM B) IgE C) IgG D) IgD E) IgA
Dandelions, Taraxacum officinale, are plants that asexually produce fruitlike propagules. Sexual reproduction is very rare in this organism. Which species concept would be LEAST useful in defining dandelions as a species?
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