What happened around 500 million years ago?

Which cycle involves chemically storing energy and releasing energy through the use of the mitochondrion

A man with type a blood marries a woman with type a blood, and their first baby has type o blood. what are the geneotypes of the man the woman and the baby

Why are fatty acids important to the cell membrane?

The simplicity of prokaryotic cells prevents them from a) growing and reproducing b) responding to their environment c) forming specialised tissues and organs d) moving through their environment

Mass is a measure of the amount of matter in a substance. Which of the following is TRUE about mass?

What is biology and name all the branches of biology that you know?

How Does crossing-over leads to greater variability of phenotypes?

After several miles of running and sprinting in intervals, the runner's muscles ache and feel fatigued. Which is the best explanation for what has occurred?

Which piece of lab equipment is used to measure the mass of a chemical sample?

9. What are the major differences between P and S waves from an earthquake and which instrument do scientists use to measure these waves?