Which of the following is NOT one of the "Big Five" mass extinctions?

A) End-Permian (251 Ma)
B) End-Triassic (200 Ma)
C) Late Devonian (about 360 Ma)
D) Eocene-Oligocene (33.9 Ma)
E) Terminal Ordovician (444 Ma)


D

Biology & Microbiology

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Where would the CFTR gene not be heavily

expressed? a. Lungs. b. Reproductive system. c. Intestines. d. Brain. e. Skin

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There are 5 independently assorting genes named A, B, C, D and E. If you bred individuals with these genotypes: AABbCcddEE x AaBbCcDDEE, what would be the expected proportion of offspring that would have the following genotype: AABbccDdee?

a) 0 b) 1/16 c) 1/8 d) 1/32

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During the formation of an embryo, the hollow ball of cells having a fluid-filled cavity is called a

A. neurula. B. blastula. C. gastrula. D. blastocoel. E. morula.

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After 3 replication cycles in PCR, there will be a total of 4 double-stranded DNA molecules.

Answer the following statement true (T) or false (F)

Biology & Microbiology