Which of the following are in order from
primary producer to 4th trophic level?
a. grass: coyote: bird: grasshopper
b. coyote: bird: grasshopper: grass
c. bird: grasshopper: grass: coyote
d. grass: grasshopper: bird: coyote
e. none of these
D
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Which high energy light wave length can penetrate sea water the deepest?
a. Blue b. Green c. Violet d. Red e. a, b, and c above
The defining trait of hominins is ____
a. large brain b. shoulder that can rotate 360 degrees c. bipedalism d. extended care of young e. nails on fingers and toes
Tissues of sharks are isotonic to seawater, but their concentrations of sodium ions, potassium ions, and chloride ions in cells and extracellular fluids are similar to those of freshwater fishes
What can you infer about the movement of sodium and chloride in these animals? A) To maintain homeostasis of sodium and chloride levels, the shark must take up additional sodium and chloride from seawater. B) Sodium and chloride will diffuse into shark gills from seawater down their concentration gradient. C) Sharks conserve sodium and chloride, limiting excretion. D) Sodium and chloride must be eliminated through the gills.
Which of the following is NOT one of the 5 general steps of biotechnology?
Amplify a small amount of DNA Chop up DNA from a donor species Identify colonies that have received DNA containing the gene of interest Grow separate colonies containing different inserted pieces of donor DNA Insert different DNA segments into human cells to be grown and studied