The rate of increase for a population refers to what kind of relationship between birth rate and death
rate?
a. their sum
b. their product
c. the doubling time between them
d. the difference between them
e. reduction in each of them
D
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An unusual red sponge is discovered near a deep-sea vent. You want to determine if this is a new species of sponge, so you separate the cells for further study. A new lab assistant accidentally adds cells from a blue sponge to your preparation while you are at lunch. When you return, you find that the sponge cells have reaggregated into a multicellular organism. What do you see if the red and blue sponges are the same species?
A. one sponge with a red side and a blue side B. one blue sponge and one red sponge C. one sponge with blue and red randomly distributed D. one purple sponge (mix of red and blue colors) E. one sponge with alternating red and blue layers of cells
The male sage grouse who is “displaying” is likely _____
a. indicating that he are ready to spar with other males b. claiming part of the territory as his own c. attracting a mate in a monogamous union d. attracting a mate in a polygamous union e. indicating that he has won a mate
One advantage of excretion of urea instead of uric acid is that urea
a. reguires less energy then uric acid to produce b. can be concentratred to a greater extent c. requires no water to excrete d. is a larger molecule
A stem that cannot increase in diameter is lacking what type of tissue?
A. xylem B. procambium C. vascular cambium D. ground meristem E. protoderm