In the absence of calcium, myosin cannot contact actin because of the presence of the ________ covering the myosin binding sites on actin
Fill in the blank(s) with correct word
troponin-tropomyosin complex
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Humans have 23 pairs of chromosomes; how many linkage groups are present in humans?
a. twenty-three—one group for each pair of chromosomes b. forty-six—one group for each chromosome c. two—one with the male gamete, and one with the female gamete d. Because linkage groups are formed when two or more genes are inherited together, the number is nearly infinite.
Which of the following is the first stage in reproduction and development?
a. cleavage b. gamete formation c. gastrula formation d. zygote formation e. blastula formation
In summer, a __________ prevents upper and lower waters from mixing. Fill in the blank(s) with the appropriate word(s)
STORCH is an acronym that represents the most common
A. vectors. B. genera of resident flora. C. infections of the fetus and neonate. D. portals of entry. E. sexually-transmitted diseases.