All cells are surrounded by a membrane.

Which sentence states a characteristic of a cell membrane?

1) It is rigid.

2) It is semipermeable.

3) It is weak.

4) It is square.

What shape is the best for an earthquake resistant structure and why?

A type if stem that grows underground

What are examples of Unicellular things in everyday life

Use the following terms in the same sentence: growth rate, birth rate, death rate, emigration and immigration.

Millie has always struggled with her weight. during a recent physical examination, her doctor recommended that she lose 30 pounds. what is the most probable reason that millie is overweight?

Under the Clean Air Act, science is the foundation for setting health-based air quality standards for certain common air pollutants.

In living organisms, lipids are used for O A. Quick energy O B. Transport O C. Insulation

Which process wears away tall sandstone rock formations due to wind? abrasion deflation impact plucking

Where does mitosis occur

The crucian carp, a Scandinavian fish, thrives in shallow ponds that freeze over during winter. While other creatures in the pond does from lack of oxygen, these carp are able to obtain energy through a biochemical pathway that does not require