Vessels that contain valves to prevent backflow of blood is called

Which organelle releases chemicals that break down large food particles into smaller ones?

Mendel made crosses between pure-breeding y’all pea plants with purple flowers and pure-breeding short pea plants with white flowers. the alleles for a y’all height and purple flowers were dominant. this cross is written a. ttpp x ttpp b. ttpp x ttpp c. ttpp x ttpp d. ttpp x ttpp

What properties of a substance determine how that substance will react when combined with other substances?