A certain atom of helium has 2 protons and 3 neutrons in its nucleus. It has 2 electrons in its electron cloud. What is the atomic mass of this atom?

Cell differentiation occurs when various genes are expressed to a different extent in different cells. What does it mean for a gene to be "turned off," or not expressed? A. Transcription into RNA does not occur for that gene. B.

Overtraining syndrome only occurs in serious athletes who are training extensively.

What does the parietal lobe control in your brain?

Mitosis - responsible for growth, repair, and development in all cells. Can you place the stages of mitosis in correct order?

What dose ELISA stand for

A carbohydrate is broken down into smaller sugars, this is an example of what type of energy? A. chemical B. mechanical C. sound D. nuclear

Which of the following is true of a eukaryotic cell in a multicellular organism? a. possess ribosomes b. possess a cell membrane c. possess a nucleus d. possess cytoplasm e. able to perform all life functions f. possess DNA

Which of the following is a renewable resource? natural gas coal oil wind

What factor affects the environmental problems and the number of choices a society can make

The earths is a thin layer of rock that surrounds the earth