Define atmosphere and give three examples of what the atmosphere does for the earth.

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

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Why do you think the puppy litter was all dark-haired?