In the figure below, if food were the limiting factor in reproduction, how would the line change if unlimited food were available?
A) The line would slope up rather than down.
B) The line would not change direction, but the clutch size values would significantly increase at each density.
C) The line would be horizontal.
D) The line would not change
Ans: C) The line would be horizontal.
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A physician sends a stool sample to your lab, and wants to know if there are lactose fermenting microbes in the sample. How might you determine if these microbes are present or not from this mixed-microbe specimen?
A. Streak the sample for isolation on Thayer-Martin agar (which contains lactose and particular antibiotics for selectivity). B. Streak the sample for isolation on a blood agar plate (which contains lactose AND red blood cells that enrich the culture for iron). C. Streak the sample for isolation on a MacConkey agar plate (which contains lactose and a pH indicator that turns pink when acid byproducts are present). D. None of the above would work-there's no way to reliably determine this feature from the specimen given.
The smartest of all invertebrates is the
a. octopus. b. squid. c. slug. d. ant. e. crab.
The conversion of PGAL to pyruvate is
accompanied by a. anaerobic respiration. b. photophosphorylation. c. the electron transfer chain. d. substrate-level phosphorylation. e. the Krebs cycle.
Migratory birds utilize electromagnetic receptors to navigate
____________________ Indicate whether the statement is true or false.