Which process uses proteins to move molecules against a concentration gradient?
a. active transport
b. passive transport
C. endocytosis
d. phagocytosis

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Donde se encuentra el adn nuclear en un organismo eucariota?