You look out the window and see some fish and a frog in a small stream lined by rocks brush some trees and buldings. Are you looking at a population or an ecosystem

What are the micro nutrients? why they are called macro nutrients?

The cell membrane is permeably selective, and some solutes cannot freely diffuse across this membrane.

What benefit does an adult dog gain from being petted with long, smooth strokes? A. The dog grows to be larger. B. The dog learns to be more dominant. C. The petting makes the dog stronger physically. D. The petting reduces stress.

What is found in the air spaces within soil?

What term describes a chemical signal made in sweat glands

A mutation occurs in the sex cells of a full-grown zebra. The mutation affects the genes responsible for producing blood proteins. What will most likely happen to the zebra?

Malignant tumors are classified according to A. how quickly they divide. B. how quickly they spread. C. the type of cells that give rise to them. D. the type of cells they are most likely to spread to.

Which of the following statements is TRUE about vitamin and minerals? a. Vitamin D is a water-soluble vitamin that is stored as hydroxycholecalciferol and released so that bones and teeth form normally. b.

A blank reaction occurs when ionic or comment bond are broken and elements ions or simpler molecules are formed

The phase in which DNA copies itself