#Question id: 11545
#Unit 7. System Physiology – Animal
Growth factors are local regulators that ________.
#Question id: 10253
#Unit 6. System Physiology – Plant
Two pathways for the splitting of sucrose are known in plants, both of which take part in the use of sucrose from phloem unloading;
#Question id: 1380
#Unit 4. Cell Communication and Cell Signaling
Which of the following apply to the synthesis of plant cell walls? Please select all that apply.
a) Cellulose microfibrils are formed by cellulose synthase complexes called rosettes
b) Cellulose is synthesized using cytoplasmic ATP-glucose and deposited as microfibrils directly on the outer surface of the plasma membrane.
c) Matrix polysaccharides of plant cell walls are synthesized in the Golgi apparatus and exported to the cell wall by endocytosis.
d) The direction of cellulose microfibril growth is determined by the orientation of arrays of microtubules lying just below the plasma membrane.
#Question id: 15987
#Unit 12. Applied Biology
#Question id: 5004
#Unit 11. Evolution and Behavior
Pax-6 usually causes the production of a type of light-receptor pigments. In vertebrate eyes, though, a different gene (the rh gene family) is responsible for the light-receptor pigments of the retina. The rh gene, like Pax-6, is ancient. In the marine ragworm, for example, the rh gene causes production of c-opsin, which helps regulate the wormʹs biological clock. Which of these most likely accounts for vertebrate vision?