Choose the solution with the lowest water concentration.
a. Glucose 20 mM, urea 30 mM, NaCl 150 mM, CaCl2 10 mM
b. Glucose 10 mM, urea 100 mM, NaCl 10 mM, CaCl2 50 mM
c. Glucose 100 mM, urea 200 mM, NaCl 20 mM, CaCl2 20 mM
d. Glucose 30 mM, urea 10 mM, NaCl 60 mM, CaCl2 100 mM
Answer: d. Glucose 30 mM, urea 10 mM, NaCl 60 mM, CaCl2 100 mM
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a. tubal ligation. b. spermicidal jelly. c. birth control pills. d. intrauterine device. e. a diaphragm.
This animal is an amniote, lays eggs, has fur,
and nourishes her young with milk from glands. This animal is
a. a platypus. b. an opossum c. a cat. d. a lizard. e. more than one of these.
Black bread molds produce diploid reproductive structures called
A) mycelia. B) zygosporangia. C) toadstools. D) basidia. E) asci.
Which of the following is an INCORRECT pairing?
A) protozoa; multicellular B) fungi; cell walls C) algae; aquatic and marine habitats D) prokaryotes; no nuclei E) viruses; acellular parasites