Because of its association with tools, the earliest human was called ________ meaning "handy man."
A. Cro-Magnon
B. Homo sapiens
C. Homo habilis
D. Neanderthal
E. Homo erectus
Answer: C
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Which generation of pea plants yielded the most significant results during Mendel’s experiments?
a. P0 b. F1 c. F2 d. F3
Considering that virtually all cells in any given individual contain the same genetic information, how is it possible to
have different cell types with unique functions? a. Gene expression is regulated such that different cell types produce different proteins. b. All cells express all proteins encoded in an organism’s genes, but turn them on selectively. c. Gene expression is regulated based on the age of the organism. d. Only some cell types make protein products, while others do not. e. Cells lose unneeded genes with each cell division.
What is the term used to describe the energy needed to get a reaction started?
a) adhesion energy b) activation energy c) chemical reaction d) dissolving
All of the following are characteristics of an effective vaccine except
A. it should have a relatively long shelf life. B. it should be easy to administer. C. it should stimulate only the antibody (B-cell) response. D. it should not require numerous boosters. E. it should protect against wild forms of the pathogen.