The most common phenotype in a natural population is referred to as the _______.
A. autosome
B. wild type
C. mutant phenotype
D. genotype
B. wild type
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In the early 1900s, many people, particularly in the southern U.S., suffered from infections
with parasitic hookworms. Many of these hookworms feed on blood cells of the host and thus also consume iron that is found in red blood cells. A symptom of a heavy infection is a craving to eat dirt—particularly clay-like soils with a high iron content. Thus, for these people, iron is a __________.
a. tradeoff b. constraint c. part of the organism’s niche d. nonlimiting resource
Gel electrophoresis is a technique that takes advantage of what property of DNA?
(a) Gel electrophoresis moves DNA across a gel through hydrophobic interactions of the hydrogen bonds (b) Gel electrophoresis moves DNA across a gel because DNA has a negative charge (c) Gel electrophoresis moves DNA across a gel through hydrophilic interactions of the hydrogen bonds (d) None of the above are true
All of the following statements regarding fetal nutrition and size are true, EXCEPT
A. Fetuses with Intrauterine Growth Restriction (IUGR) are insulin-resistant, saving glucose for the brain since the brain does not have insulin-dependent glucose transporters. B. Obesogenic environments include those where the nutrition may be described as the Typical Western Diet, and they promote adult Type II Diabetes later in life for IUGR babies. C. Macrosomia is associated with gestational diabetes and premature birth. D. Poor uteroplacental and fetoplacental blood flow is associated with IUGR. E. Twinning has no effect on individual fetal nutrition delivery.
A cardiovascular disease is any disease that affects the heart or blood vessels.
a. true b. false