In the C4 pathway, what is the source of carbon?
A) Carbon dioxide
B) Water
C) Glucose
D) NADPH
E) ATP
A
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Knoblike sacs where the inner colon lining protrudes through the intestinal wall are called
a. diverticula. b. ulcers. c. haustra d. sphincters. e. appendices.
Stem cell lines are developed from ________
A) multipotent cells B) inner cell mass cells from a blastocyst C) cells collected from umbilical cords D) cells collected from amniotic fluid
In fruit flies, the genes for body color and wing shape are linked. When a dihybrid black straight-winged fly is test-crossed with a double-recessive brown curly-winged fly, the frequency at which black curly-winged and brown straight-winged flies are seen in the progeny is called the _______ frequency.
A: mutation B: recombinant C: allele D: parental E: meiotic
There are no microorganisms that can cross the transplacental barrier, so fetuses are protected until birth.
a. true b. false