Consider this statement: Air is matter. Which facts best support the statement? Balloons can be filled with air.

Air is essential for life to exist.

Air has mass.

Air is not an element.

To float on air is to be happy.

Air can't be seen.

Which of the following substances is a fluid expressed from the mother's breast before breast milk develops? colostrum prolactin oxytocin lactoferrin

If a wind starts at the North Pole and blows towards the equator, in which direction will the wind be moving when it leaves the pole? When it has moved halfway to the equator?

Which of the following is a way that muscle fibers get energy needed for contraction? 1) When a muscle is contracting during peak activity, it quickly uses up stored creatine phosphate which was produced during moderate exercise.

In what situation does rna play a role similar to enzymes

Why are the constellations Ursa Major and Ursa Minor called circumpolar constellations?

When Jacob starts running, his legs move faster and his heart rate increases. Which types of muscles are involved in these changes

Which cells are not formed during meiosis

Why did the average life expectancy fall during the Black Death? Select one: a. The plague affected mostly the elderly, especially women. b. The principle victims were infants and young adults. c. There was high infant and elderly mortality. d.

Plants produce carbon dioxide as a product of cellular respiration but you know that plants release oxygen carbon dioxide develop a logical argument for how this is possible

Rna polymerase binds to regions pf dna called blank which are start sinals for transcription