Why does planting a cover crop help conserve soil?
I) controls weed populations
II) reduces soil loss due to wind and water erosion
III) increases soil nutrients when plowed under and allowed to decompose
A) only I
B) I and II
C) II and III
D) I, II, and III
C
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As electrons pass from photosystem II to photosystem I, they return to a lower energy level,
1.releasing free energy which is all lost as heat. 2.used to pump protons across the thylakoid membrane. 3.used to synthesize NADPH. 4.used to split water and release oxygen. 5.re-emitted as light.
____ are teeth adapted primarily for piercing prey and tearing food
a. Bicuspids b. Canines c. Incisors d. Molars e. Premolars
Most archaeal mRNAs like those of eukaryotes are spliced.
Answer the following statement true (T) or false (F)
Organisms called plasmodial slime molds move by which process?
A) contractile cytoskeleton movements B) growth in the direction of sunlight C) beating of cilia D) cytoplasmic streaming