Based on the fossil record, which of the following groups evolved about 1.8 million years ago and
made fairly sophisticated tools, including the hand axe?
a. Homo habilis
b. Homo erectus
c. Australopithecus africanus
d. Australopithecus afarensis
e. Homo neanderthalensis
B
You might also like to view...
The Rickettsial disease that killed Howard Ricketts and Stanislaus Prowazek was
A. louse-borne typhus. B. tick-borne typhus. C. yellow fever. D. bubonic plague
What is required to restart a heart that has entered cardiac arrest? a. A shot of epinephrine
b. None of these choices will restart a heart that has entered cardiac arrest. c. CPR. d. Elevation of the individual's legs. e. An electrical shock to the heart.
In human gene therapy ________
A) normal versions of genes are transferred to patients who carry a mutated allele B) harmless bacteria make important proteins for humans that cannot produce these proteins on their own C) bacterial plasmids are used to transfer genes to human patients D) genetically engineered alleles, usually from other species, replace mutated alleles
Bacteroides inhabit the intestinal tract of mammals and benefit the host by degrading which of the following?
A. Pectin B. Cellulose C. Complex carbohydrates D. All of the choices are correct.