How many species have internal skeletons?

Name the organ where ammonia converted in to urea.

You know certain things about a cat. How would Aristotle have classified this type of animal? A. He would call it a shrub B. He would call it a sky dweller C. He would call it a water dweller D. He would call it a land dweller

Which of the following statements about sunspots is false? a. They are areas of the sun that are "burnt out." c. They are cooler than the surrounding areas of the sun. b. They occur on the surface of the sun. d. They occur in cycles.

What are the special organs that store leukocytes

Which explains the information needed to calculate speed and velocity? Both require the total distance, but velocity also requires time and displaceme Both require time, but velocity requires displacement and speed requires dista Speed requires

The root of the tooth is held by the periodontal ligament a. True b. Falsee

At the center of the Andromeda galaxy is a source of x rays that scientist believe is a black hole with how many more times than the sun

True or false? The more similar two organisms are, the more distant their common ancestor is.

The blood-brain barrier a. is fully developed in humans when they are born. b. prevents many drugs from entering the brain. c. is designed to allow all drug compounds into the brain. d. cannot be penetrated, even with trauma to the brain.

Which is another name for observations? Models Predictions Data Inferences