HEEL PLEAS Serena knows that scientists use physical characteristics to classify organisms. She studies the figures of four different organisms. Shark , octopus , fish , jelly fish

Which two organisms should Serena conclude are most closely related?

1 and 2

1 and 3

2 and 3

2 and 4

In what layer of the sun is energy transfers between atoms

What is one reason why transpiration is important in plants? question 19 options: it produces food from the sugar in the plant cells. it enables the flow of water out of the plant. it produces carbon dioxide in the leaves of the plant.

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.