The most recent common ancestor of a bird and a turtle is also the most recent common ancestor of a bird and which other group?
A. snake
B. human
C. crocodile
D. frog
E. None of the of the answer options is
correct.
A
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In the cell, energy released by electrons is often used to phosphorylate ________.
A. ATP B. NAD C. oxygen D. ADP E. pyruvic acid
The deuterostomes are animals whose
a. stomach is in front of the crop. b. mouth is covered by a fleshy lip. c. blastopore becomes the anus. d. digestive tract is lined by mesoderm.
An ecologist is studying the painted turtle population in a small pond. At the beginning of the year, there are 100 individuals. Over the course of a year, 40 turtles are born and 60 die. There is no migration
What is the birth rate per year for this population? A) 20 B) 60 C) 40 D) 0.4 E) 0.6
The enzyme that uses viral RNA as a template to produce complementary double-stranded DNA is
a) DNA polymerase. b) DNA ligase. c) RNA-dependent RNA polymerase. d) reverse transcriptase.