Turbinates were found in therapsids, extinct reptiles thought to be ancestors of mammals. What could the researchers conclude from this observation?

A. Ectothermy arose before fur.
B. Ectothermy arose after fur.
C. Endothermy arose before fur.
D. Endothermy arose after fur.
E. Birds did not descend from reptiles.


C. Endothermy arose before fur.

Biology & Microbiology

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The pulmonary artery carries blood away from the

a. aorta. b. right atrium. c. right ventricle. d. left atrium. e. left ventricle.

Biology & Microbiology

During meiosis, what are the gametic consequences of a paracentric inversion with a single crossover event, compared to a pericentric inversion with a single crossover?

What will be an ideal response?

Biology & Microbiology

In humans, alleles for each gene are inherited from Select one:

a. males and females (two alleles from each parent). b. males and females (one allele from each parent). c. males only (dads). d. females only (moms). e. None of the answer choices are correct.

Biology & Microbiology

Restriction endonucleases are especially useful if they generate "sticky" ends. What makes an end sticky?

A) blunt ends B) 5' cap C) single-stranded complementary tails D) 3' cap E) poly-A sequences

Biology & Microbiology