In 1953, Watson and Crick published a paper that described the structure of DNA
Indicate whether the statement is true or false
TRUE
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The human genome is composed of approximately _____ billion base pairs
a. 1 b. 3 c. 7 d. 10 e. 14
Which of the following is true regarding some insect tracheal systems?
a. They are associated with the blood circulatory system. b. They excrete body wastes as well as transport gases. c. Their spiracles can become clogged by spraying them with oil. d. The tracheal tubes are continually open in large terrestrial insects. e. They contain respiratory pigments to enhance oxygen transport.
A pancreatic hormone that causes cells to break down glycogen and release glucose is known as _______.
A. calcitonin B. glucagon C. insulin D. pancreas E. melatonin
Organisms that reproduce sexually ________________________
(a) must be haploid, unlike organisms that reproduce asexually. (b) can reproduce only with a partner that carries the same alleles. (c) create zygotes that are genetically identical to each other. (d) undergo a sexual reproductive cycle that involves an alternation of haploid cells with the generation of diploid cells.