Where does digestion in a sponge takes place?
a. spicule
b. osculum
c. mesophyll
d. spongocoel
e. individual cells
e
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The floral meristem in flowering plants develops from the shoot apical meristem, which usually produces leaves. Which floral part is NOT a modified leaf?
A) sepal B) carpel C) stamen D) pollen tube
Which of the following factors likely contributed to the accumulation of O2 within Earth's atmosphere?
A. the evolution of cyanobacteria B. the fact that oxygen is also cycled during the carbon cycle C. the fact that there is a slight "de-coupling" between photosynthesis and respiration D. the fact that photosynthesis releases O2 as a product E. All of these answer options are correct.
Metamerism refers to:
A. a body type that contains clearly distinguishable dorsal and ventral surfaces. B. the division of the body into a series of repeating segments. C. loss of crystalline structure of an amorphous state. D. None of the choices is correct.
A bird flashing white patches underneath its wings is an example of what type of communication?
A) Sound B) Chemical C) Passive visual D) Physical contact E) Active visual