During what period did one of the greatest extinctions of mammals occur?
A) Cretaceous
B) Permian
C) Pleistocene
D) Carboniferous
C
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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.
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
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
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