Which of the following is thought to be the
descendant of engulfed ancient bacteria?
a. nuclei
b. Golgi bodies
c. ER
d. mitochondria
e. lysosomes
Answer: d
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Dendritic cells are phagocytes with antigen-presenting properties
Indicate whether the statement is true or false.
If you skip a meal, which of the following
conditions will prevail? a. Insulin levels will rise. b. Glucagon levels will rise. c. Glycogen will be converted to glucose. d. Insulin levels will rise, and glycogen will be converted to glucose. e. Glucagon levels will rise, and glycogen will be converted to glucose
Normally, only female cats have the tortoiseshell phenotype because _____
A) a male inherits only one allele of the X-linked gene controlling hair color B) the Y chromosome has a gene blocking orange coloration C) only males can have Barr bodies D) multiple crossovers on the Y chromosome prevent orange pigment production
The largest U.S. national parks are of sufficient size to maintain populations of all mammal species originally found in these parks.
a. true b. false