“Smaller teeth and jaws, presence of a chin, thin
facial bones, and rounder, higher skull” would be a
partial description of
a. Australopithecus robustus.
b. Australopithecus boisei.
c. Homo habilis (early Homo).
d. Homo erectus.
e. Homo sapiens.
Answer: e
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The diagram below shows inbreeding between _________ which, over time, could lower the fitness of the population. This lowering of fitness because of inbreeding is called _________.
A. siblings; inbreeding depression
B. cousins; inbreeding depression
C. siblings; genetic drift
D. cousins; genetic drift
E. siblings; sexual selection
If the human egg has 3 billion base pairs, how many nucleosomes will be present in the nucleus of a human somatic cell?
What will be an ideal response?
You are given an experimental problem involving control of a gene's expression in the embryo of a particular species. One of your first questions is whether the gene's expression is controlled at the level of transcription or translation. Which of the following might best give you an answer?
a) You use an antibiotic known to prevent translation. b) You measure the quantity of the appropriate pre-mRNA in various cell types and find they are all the same. c) An analysis of amino acid production by the cell shows you that there is an increase at this stage of embryonic life. d) You assess the position and sequence of the promoter and enhancer for this gene. e) You explore whether there has been alternative splicing by examining amino acid sequences of very similar proteins.
Products of carbon reactions The carbon reactions produce ATP and NADPH.
a. true b. false