In the light-independent reactions of photosynthesis, CO2 is added to a five-carbon molecule known as
A. cellulose.
B. ribose.
C. deoxyribose.
D. RuBP.
E. CAM.
D. RuBP.
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The parasitic lampreys, living members of the ____ lineage, have shards of cartilage that partially cover the nerve
cord, which may represent an early stage of the evolution of vertebrae.
a. Petromyzontoidea b. Placodermi c. Cephalochordata
d. Urochordata e. Myxinoidea
What signals the end of germination?
a. cracking of seed coat b. root breaks out of the seed coat c. emergence of shoot d. shoot rises above ground e. cotyledon falls off
Prior to the divergence of animals, an ancestor is proposed to have developed the key shared trait of all animals, the
A. body form of multicellularity. B. presence of a mouth by which to consume nutrition materials. C. ganglia or brain cells to control all motion. D. embryonic development of the mouth first, from embryonic cells. E. body form of having true tissues.
In Figure 17-1, the purpose of growing the donor cells in nutrient-limited media is:
a. to have small cells that would be easier to manipulate.
b. to replicate a normal environment.
c. to force the donor cell nucleus into the G0 cell stage.
d. to induce favorable mutations.
e. to initiate apoptosis.