Which cell type is a subgroup of lymphocytes, abundant in the liver, and has important roles in innate immune protection against viruses, bacteria, parasites, and even tumor cells?
A) dendritic cells
B) T cells
C) macrophages
D) B cells
E) natural killer cells
Answer: E
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What is the main reason that a person sitting on the beach with an air temperature of 15 °C loses heat less rapidly than when immersed in lake water at 15 °C?
A) Water conducts heat more efficiently than air does. B) Water evaporates, and heat is lost to evaporation. C) Metabolic heat production is greater in air than in water. D) Air is a poor insulator.
Gene A occurs on chromosome #5; gene B
occurs on chromosome #21. Therefore, these two portions of the chromosome CANNOT be
a. homologous. b. in the same individual. c. homozygous. d. alleles. e. recessive
Carbohydrates converted to ____ are ____ in
plants. a. cellulose; stored b. starch; stored c. starch; transported d. fats; stored e. glucose; transported
Give a reason why DNA makes a better material than RNA for the storage of genetic information, and explain your answer
What will be an ideal response?