Introduction: A mycorrhiza is a mutualistic relationship between fungal hyphae and the roots of true plants. The fungal hyphae increase the absorptive surface area of the roots of the plant by aiding in the absorption of water, phosphorus, and other mineral ions from the soil to the roots of the plant. The plant is photosynthetic and provides the fungus with carbohydrates. 6. Read the introduction and provide an explanation for why one group of plants grew better than the other group of plants.

What must be true for natural selection to heppen

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .