Blood vessels that have thinner walls that are more likely to collapse when blood is withdrawn during a venipuncture are
a. Capillaries
b. Veins
c. Arteries
d. Lymphatics
Answer: b. Veins
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In the mechanics of conjugation, exclusive of gene transfer, Hfr and F+ strains behave the same.
Answer the following statement true (T) or false (F)
Frogs are in which group?
In most species, the female frog lays her eggs directly in the water as a male clasps her back and releases sperm. The fertilized eggs hatch into legless, aquatic tadpoles. Most tadpoles feed on algae, and have gills. As they mature, tadpoles develop legs and lungs, lose the tail, and acquire carnivorous tastes. A. amphibians B. mammals C. lancelets D. fishes E. reptiles
Of the major tissue systems associated with land plants, the ________ tissue system covers the outer surface of the primary plant
A) ground B) parenchyma C) dermal D) meristem E) vascular
The proteins necessary for the use of lactose in E. coli are collectively called the
A. lac operon. B. lac promoter. C. lac transcriptional operator. D. lac suppressor. E. lac regulator.