Most of the cellular component of blood is composed of _____ blood cells, which do not have _______
a. red; nuclei
b. red; carbonic anhydrase
c. white; nuclei
d. white; carbonic anhydrase
e. white; hemoglobin
A; Red cells compose most of the blood cells, and make up 44% of the total blood volume. They lose their nuclei and other organelles during development, retaining soluble proteins, most prominently hemoglobin, but also carbonic anhydrase.
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How does the reproduction of HIV and lambda phage differ?
A. HIV contains reverse transcriptase enzyme, while lambda phage does not. B. Immediately after HIV enters the cell, reverse transcriptase RNA is transcribed into DS DNA. Lambda phage reverse transcriptase DNA is integrated immediately into the host genome. C. HIV contains integrase, while lambda phage does not. D. HIV attaches to specific proteins on the cell surface, while lambda phage does not. E. Lambda phage attaches to specific proteins on the cell surface, while HIV does not.
Which of the following serves as a flexible coat of armor for a protist?
a. pellicles b. lysosomes c. vesicles d. cilia
What is the function of the gallbladder?
a. production of gastric fluids b. production of digestive enzymes c. storage of bile d. production of bile
Respond to statements 113–117 with reference to the five biomes
listed below. a. tundra b. grassland c. desert d. taiga e. savanna M 113. A plant community composed primarily of shrubby trees widely spaced and surrounded by grasses is this biome. M 114. A community composed of herbaceous plants, no trees, a very short growing season, and relatively few animal species is likely to be this biome. E 115. Variable daily temperatures and plants that are highly resistant to desiccation characterize this biome. M 116. This biome has the richest soils. E 117. Conifers are most likely to be found in this biome.