Scientists discover several skulls of hominids that are now extinct. Which of the following skull features would be most likely to appear in an older skull?
A) a jaw that protrudes from the face at a small angle
B) a jaw that protrudes from the face at a large angle
C) a small brow ridge combined with small teeth
D) a large cranial capacity combined with a small brow ridge
Ans: B) a jaw that protrudes from the face at a large angle
You might also like to view...
A randomly selected group of organisms from a family would show more genetic and anatomical
variability than a similar group randomly picked from a _____.
a. class b. genus c. order d. phylum e. kingdom
DNA most directly determines which __________ are made by a cell
a. polysaccharides b. polypeptides c. nucleotides d. triglycerides e. fatty acids
A decrease inPCO2 within the lung will result in a ________ in the pulmonary vasculature and a ________ in the bronchioles.
A) lack of change : weak bronchoconstriction B) weak vasoconstriction : bronchodilation C) weak vasodilation : bronchoconstriction D) vasoconstriction : lack of change E) vasodilation : weak bronchodilation
HIV is classified as a retrovirus because
A) it infects only cells with a CD4 receptor. B) it makes a DNA copy of its RNA once inside the host cell. C) this virus is composed of two cells surrounded by a lipoprotein coat. D) it reverts to an inactive form when it infects B lymphocytes. E) it causes the production of HIV antibodies.