1. What is the first line of defense against infection for the human body?

A. white blood cells

B. saliva

C. skin

D. red blood cells

Which statement explains what happens as magma rises inside a volcano? Gases will contract in the chamber. The pressure of the gas will disappear. The magmatic pressure decreases. Magma moves to other chambers.

A disease kills half the populations of both seals and bears. If all other factors in the environment remain the same, how are the seal and bear populations likely to change over the next 10 years?

Which element of weather is caused by a difference in air pressure between two air masses?

What is the most important role of lipids?

Which descriptions refer to cirrus clouds? Select three options. are fluffy are wispy produce snow form at high altitudes form from ice crystals

What is it called when a bacterium uses a virus to transfer its DNA to another bacterium?

Which definition best describes global warming? A. A long-term change in the Earth's climate B. A long-term increase in the Earth's average temperature C. A long-term change in the climate of a region or a city D.

Which of these phases of mitosis takes place first?

1) which color has the longest wavelength? A - red B - blue C - green D - orange 2) gamma rays, X-rays, visible light, and radio waves are all types of ___.

2) Which Sex Chromosome contains more Sex - linked traits and WHY?