What is the word biology mean answer fast

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

Identify the structures ! 20 points