Cell Structure and Compartments
An organism's first line of defense against attack by an invader such as a virus or bacterium is usually

its body wall
a nonspecific immune response
a specific immune response
to flee or hide

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Cell Structure and Compartments
The highly folded membranes found in such eukaryotic organelles as mitochondria and chloroplasts

assist with cell movement
make it possible to package large amounts of DNA within the cell
help the cell against physical damage
increase the surface area where key chemical processes can occur

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Cell Structure and Compartments
Lysosomes are specialized vesicles in __________ that contain digestive enzymes for the breakdown of food. A related organalle known as a vacuole, which is found in __________ , also contains enzymes but in addition may act as a storage organelle for nutrients or water.

plants; animals and fungi
plants and fungi; animals
animals; plants and fungi
animals and plants; fungi

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