One of the problems with the trichromatic theory of color vision is that it cannot explain why negative afterimages (i. e., afterimages that appear in complementary colors) occur. the opponent process theory of color vision, however, neatly explains this phenomenon. which principle of critical thinking does this remind us to consider

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a