Which of these body systems has cells that attach to each other to form a leak-proof barrier? Select one:

Reproductive system.

Respiratory system.

Urinary system.

Endocrine system.

Match the types of competition to their descriptions.

Which excerpt from the land, part 4 best supports the claim that paul is a talented horseback rider? a/“figure that says more than anything else! now, i want to ride that stallion! " b/my daddy shook his head. "paul only rides horses he knows. ” c/? i glanced over at the other rider. the fellow was older than i, and had the weight of a man on him. d/a man out of alabama, man name of ray sutcliffe, told my daddy i was such a good rider, he wanted me to ride some races for him.

In a cladogram' when does a group of organisms branch off