From which source is it thought that chloroplasts in algae originated

What is the branch of science that is concerned with the way in which the organism and its parts function?

What are the secondary consumers in the food web

What organic molecule is the basis of enzymes.?

Do you think the world is flat?

When a blacksmith is working with hot metal, what places does the thermal energy go? Question 15 options: The thermal energy in the hot part of the metal moves to the cold part of the metal. The thermal energy is transferred to the anvil and hammer.

Fast moving electrons travel through the empty space surrounding the nucleus. How are electrons held within the atom?

Study island classification of organisms and animal diversity

After being rushed to the hospital, charlene is told she has an ectopic pregnancy. what does this mean?

What do arteries do?

What is a biological entity?