The hallmark characteristic of the hominids leading to humans was the development of

A. an opposable thumb.
B. the ability to care for young.
C. bipedalism.
D. a varied diet.


Answer: C

Biology & Microbiology

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____ are involved in transfer of genetic

information from one bacterial cell to another.

a. Flagella b. Cilia c. Pili d. Ribosomes e. Plasmids

Biology & Microbiology

In a Chi-square test, as the value of the ?2 increases, the likelihood of rejecting the null hypothesis ________

Fill in the blank(s) with correct word

Biology & Microbiology

The other species of humans that were alive contemporaneously with Homo sapiens were:

a. Homo neanderthalensis, Homo floresiensis, and Homo erectus. b. Australopithecus afarensis and Homo neanderthalensis. c. Australopithecus afarensis, Homo neanderthalensis, Homo floresiensis, and Homo erectus. d. Homo neanderthalensis and Homo floresiensis. e. Homo neanderthalensis and Homo erectus.

Biology & Microbiology

Which of the following statements is true?

A) Arthropods have an open circulatory system, while annelids have a closed circulatory system. B) Vertebrates have an open circulatory system, while annelids have a closed circulatory system. C) Vertebrates have an open circulatory system, while arthropods have a closed circulatory system. D) Annelids have an open circulatory system, while molluscs have a closed circulatory system.

Biology & Microbiology