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 specific immune response
to flee or hide
a nonspecific immune response

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

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Cell Structure and Compartments
Microtubules, motor proteins, and actin filaments are all part of

the cytoskeleton of eukaryotic cells
the rough ER (endoplasmic reticulum) in prokaryotic cells
the mechanism of photosynthesis that occurs in chloroplasts
the process that moves small molecules across cell membranes

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