What is the main function of the digestive system? Name two organs in the digestive system and how they help the system do its job.
What is the main function of the circulatory system?
Name two organs in the circulatory system and how they help the system do its job.
What is the main function of the nervous system?

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?

Organelles found in plant cells that function through photosynthesis to produce glucose from carbon dioxide and water are called — question 21 options: chloroplasts guard cells photosynthons

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit. there is a precise compatibility between the active site and the lactose molecule. specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed. reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.