The key specializations that occurred in the evolution of mammals include all of the following except
A. digestive tract specialization.
B. different teeth suited to their diet.
C. warm-bloodedness.
D. reduction in brain size.
E. the presence of a placenta in most.
Answer: D
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In humans, where is the tympanic membrane?
a. in the outer ear, adjacent to the pinna b. deep within the middle ear c. between the outer ear and the middle ear's cavity d. adjacent to the stapes e. between the middle ear and inner ear
A horseshoe crab uses its long extended spine for what purpose?
a. defending its territory b. digging for clams c. fighting for mates d. protection from predators e. flipping itself right side up
The ecological footprint of an average Egyptian is greater than that of an average American.
Answer the following statement true (T) or false (F)
Which of the following species of hominin is the most recent to have become extinct?
A) Homo erectus B) Homo neanderthalensis C) Homo ergaster D) Homo habilis