The original impetus to sequence the human genome was to investigate
A) how the four nitrogenous bases encode information.
B) how people vary.
C) how cancer arises.
D) the effects of exposure to low-level radiation on the genetics of populations.
D) the effects of exposure to low-level radiation on the genetics of populations.
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Historically inaccurate diagnosis of acid reflux disorders and gastric ulcers has been improved by _____
A) pH monitoring B) X-ray technology C) screening for H. pylori infections D) colonoscopy E) sonography
The prevention of genetic exchange between two species because they reproduce at different times of
the day or year is called:a. hybrid sterility. b. genetic isolation. c. sexual isolation. d. mechanical isolation. e. temporal isolation
Which enzyme is used to bind DNA fragments together?
A) restriction enzyme B) lysozyme C) DNA ligase D) DNA polymerase
Answer the following statements true (T) or false (F)
1. An assumption for the use of molecular clocks is that neutral mutations accumulate at a rapidly increasing rate over time between two species. 2. A modern goal of systematics is to classify organisms based on similarity of form and function, regardless of their evolutionary relationships. 3. A phylogenetic tree shows the hypothesized evolutionary relationships among organisms, meaning that its structure can be revised and changed as new information about those relationships becomes known. 4. The alternate host for Entamoeba histolytica is the Anopheles mosquito.