Which of the following is formed from a matrix of collagen fibers embedded in a hard mineral substance?
A) cartilage
B) bone
C) adipose tissue
D) fibrous connective tissue
Answer: B
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Diatoms are mostly asexual members of the phytoplankton. Diatoms lack any organelles that might have the 9 + 2 pattern
They obtain their nutrition from functional chloroplasts, and each diatom is encased within two porous, glasslike valves. Which question would be most important for one interested in the day-to-day survival of individual diatoms? A) How does carbon dioxide get into these protists with their glasslike valves? B) How do diatoms get transported from one location on the water's surface layers to another location on the surface? C) How do diatoms with their glasslike valves keep from sinking into poorly lit waters? D) How do diatoms with their glasslike valves avoid being shattered by the action of waves? E) How do diatom sperm cells locate diatom egg cells?
What is directly responsible for pumping protons out of the matrix in the mitochondria?
a. protein complexes I, II, III, and IV b. cytochrome c and ubiquinone c. protein complexes I and III d. protein complexes I, III, and IV e. NADH and FADH2
The strand of DNA for a particular gene that is copied by the RNA polymerase to form mRNA is called the ________ strand.
A. copy B. transcription C. template D. leading
Plants in this biome have small leaves coated with protective waxes to reduce evaporation, and they can survive a fire
A) Tropical rain forest B) Desert C) Chaparral D) Tropical deciduous forest E) Savanna