Which of the following chemical equations is balanced?

A. H2 + Cl2 4HCl

B. 4H2 + 2O2 2H2O

C. 4Fe + 3O2 2Fe2O3

D. 2Fe + HCl FeCl2 + H2

What causes a plant to wilt? the cells die. the cells lose turgor pressure. the cells run out of sugar. the cells lose salt?

During vomiting the food moves in the opposite side. Why?

Why is homeostasis essential for living things?

Which of the following is NOT a reason that scientists classify organisms? A to organize organisms B to easily identify organisms C to determine the age of organisms D to ensure the use of a common language

The energy pyramid shows the flow of energy through a temperate forest ecosystem. Which trophic level has approximately 100 times more energy than the apex consumer level? A. Apex Consumers B. Tertiary Consumers C. Secondary Consumers D.

How do trees that produce seedless oranges are grown

Immunoglobulins are produced by which leukocyte? A. Monocytes B. B lymphocytes C. T lymphocytes D. Plasma cells

In the ecological pyramid, organism A represents a

Mica has one direction of ___ so it breaks into sheets.

Which state looks like it has an area shaped like the heel of a boot?