Permafrost is a layer of permanently frozen soil found in the biome. a. grasslands b. tundra c. temperate deciduous forest d. savanna

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.