Birds evolved directly from:

A) dinosaurs

B) mammals

C) amphibians

D) fish

What causes plastic flow to occur

All the things in an experiment that must be the same to make it fair are called

An atom consists of three types of particles: proton. Electron, and neutron. Each atom of an element has the same number of which type of particle

Why can influenza viruses reinfect a person even after memory cells have produced immunity?

Why is creativity considered a scientific attitude

What is the process which cells in your body become different types of cells?

Which of the following statements shows an example of operant conditioning? A.) A chicken learns that if it pecks on a button, a food pellet will be released into its cage. B.) Pavlov taught a dog to salivate every time it heard a bell. C.

A scientist has several specimens from the same time period from several thousand years ago. Which two specimens should he study so that he can learn about the amount of rainfall at that time and the kinds of plants that grew then?

Which is a characteristics of both plants and animals A. life cycles B. learned behaviors C. Produce their own food D. Reproduce using seeds

Case Study CryingBaby 1. What symptoms has Kayla exhibited over the first months of her life?