During what period did one of the greatest extinctions of mammals occur?

A) Cretaceous
B) Permian
C) Pleistocene
D) Carboniferous


C

Biology & Microbiology

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Polydactyly is considered a Mendelian trait because

A) it is caused by linked genes. B) it is caused by a single gene. C) it is caused due to environmental factors. D) it affects the stem cells.

Biology & Microbiology

A fruit that develops from several ovaries in a single flower, such as a raspberry, is called a(n) ____

a. aggregate fruit b. accessory fruit c. multiple fruit d. simple fruit e. compound fruit

Biology & Microbiology

In mammals, urine drains out of the ____ into a collecting duct

a. distal convoluted tubule b. Bowman's capsule c. descending segment of the loop of Henle d. proximal convoluted tubule e. ascending segment of the loop of Henle

Biology & Microbiology

The half-life of 14C is 5,730 years. If you test a fossilized bone and find that it has 1/8th the 14C as a modern bone, you could conclude that it is approximately years old.

A. 5,730 × 3 = 17,190 B. 5,730 × 2 = 11,460 C. 5,730 × 1 = 5,730 D. 5,730 / 8 = 716 E. 5,730 × 8 = 42,960

Biology & Microbiology