allergic

Subject:

cup-shaped sac at the beginning of the nephron, which surrounds the glomerulus.

lysosomes

Subject:

sac-like organelles that contain hydrolytic enzymes.

polymers

Subject:

(also called macromolecules) large, more complex molecules formed when monomers join together....

Subject:

special chemical molecules that transmit nerve impulses across a synapse.

explant

Subject:

small pieces of the parent plant grown in plant-tissue culture.

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