How many amino acids cannot be made by tho body, so they must be obtained in the diet?

What is an example of a code used by organisms?

Kala added a spoon of yeast and hot boiling water to knead bread dough, whereas Rupa added warm water to knead the dough with yeast in it. Both of them made bread. Whose bread will be soft? Why?

Why do small fish swim around a large sting ray?

A lung cell maintains homeostasis. Of what is this an example? A: intercellular communication B: intracellular communication C: ion channel-linked receptor D: enzyme-linked receptor

Mothers and teachers often say they need another pair of eyes on the backs of their heads. And another pair of hands would come in handy in many situations.

What health problems can chemicals in the environment cause? a. cancer c. chronic disease b. birth defects d. all of the above

The main light-absorbing molecules found in plant leaves are called

What phylum is a spider in

What natural resources are pumped from the ocean

What is plastic texture in the earth's structure?