A star is bom when gas and dust from a nebula become so dense and hot that nuclear fusion starts. Which of the following forces is

responsible for the formation of a star?

A.

friction

B. electromagnetic energy

C. gravitation

D. magnetism

Wich refers to the maintenance of a stable internal environment despite changing external conditions

What are some of physical concerns williams discusses when considering a trip to mars?

Henry touched a hot plate and immediately moved his finger away from it. Which best explains the integumentary system's role in this reaction? Oil in the skin sensed the temperature difference. Nerve endings in the skin responded to the heat.

Which of the following best describes the main purpose of the sequences of nitrogenous bases in DNA? * A gives DNA the shape needed for translation B prevents mutations when coding for amino acids C forming the hydrogen bonds between bases D carries

Suppose four atoms of oxygen gas and two atoms of hydrogen gas are combined. Determine how many atoms of water and oxygen gas will be produced.

What do you call a flowers colorful special leaves?

How much does camouflage affect predation on mice by owls with and without moonlight?

Scientist use the characteristic of life to determine life on earth

Which part of the brain controls body functions related to skeletal muscles?

Yasmine uses the model of a double pump to describe the human heart. Which statement about the human heart explains why Yasmine's model is reasonable?