Melvin Calvin used ________, a specific ________, to deduce the Calvin-Benson cycle of photosynthesis.
Fill in the blank(s) with the appropriate word(s).
14C; radioisotope
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Which of the following groups contains organisms that produce free-living larvae?
a. cnidarians b. echinoderms c. arthropods d. cnidarians and echinoderms e. cnidarians, echinoderms, and arthropods
Human use of ecosystems
A. is in harmony with natural ecosystems. B. increases the number of animals present. C. requires the alteration of previously existing ecosystems. D. does not occur.
Inflammation of the protective coverings of the brain and spinal cord is known as ________
Fill in the blank(s) with correct word
In instances in the eukaryotic genome, DNA sequences represent evolutionary vestiges of duplicated copies of genes. What are such regions called and what are their characteristics?
What will be an ideal response?