What is the purpose of an experiment in the scientific method?

If eras are marked by major changes in life forms, what distinguishes one period from the next

Which is not an example of an everyday problem that can cause stress? You forget your lunch. Your grandfather dies. You argue with your brother. You lose your keys.

A complete transection of the spinal cord will result in

What happens when two parents with different traits have offspring why

All cells must have energy to function. What do cells use for food? A) fats B) minerals C) protein D) sugars

What is alwasy true about a binary bond

Which of these examples demonstrates metabolism? A. A person eats a large dinner for digestion and energy. B. A human's skin has the ability to tan in the sun. C. A person puts on socks because his feet are cold. D.

What structure in the fetal heart allows for mixing of blood between the two atria?

Which of the following is a constructive process? deposition detachment transport plucking

Coal deposits were formed from? A. Plant life in ancient B. Ancient plankton and marine life C. Freshwater organisms from the last 100,000 years D. Modern plants and animals