If female worker ants can reproduce then why do they need a queen?

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from