A bacterial genus that has waxy mycolic acid in the cell walls is
A. Salmonella.
B. Streptococcus.
C. Corynebacterium.
D. Mycobacterium.
E. Mycoplasma.
Answer: D
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One of the most extensive animal radiations is that of terrestrial arthropods (includes insects). They excrete uric acid as their form of nitrogenous waste
Why does this allow them to conserve more water than a mammal with extensive kidney tubules for water reabsorption? A. The high solubility of uric acid allows the excretory system to reabsorb water. B. Uric acid levels stay high in the blood maintaining a strong osmotic gradient, which allows water to be reabsorbed. C. After precipitation, uric acid no longer influences osmolarity; water returns to the hypertonic tissues. D. After precipitation, uric acid no longer influences osmolarity; water leaves the hypertonic tissues.
Spore is another name for gamete
Indicate whether the statement is true or false.
The bony or cartilaginous cranium in chordates is adaptive because it
A. develops into the postanal tail. B. protects the brain. C. allows movement, as a lightweight exoskeleton structure. D. replaces the notochord in most chordates. E. forms the vertebrae.
One possible use of transgenic plants is in the production of human proteins, such as vaccines. Which of the following is a possible hindrance that must be overcome?
A) prevention of transmission of plant allergens to the vaccine recipients B) prevention of vaccine-containing plants being consumed by insects C) use of plant cells to translate non-plant-derived mRNA D) inability of the human digestive system to accept plant-derived protein