Need help asap!! Do not comment links or files, you will get reported!
What are some of the ideas about the cause of the Cambrian Explosion?
This is the answer key The Cambrian Explosion may have occurred due to a genetic revolution.
Furthermore, a rise in the oxygen levels may have allowed animals to become
larger. An additional explanation was that there was an "arms race" to evolve into
an organism that would not be eaten.

But I need someone to paraphrase it, so could someone do that for me or either go to the website where my teacher is wanting the answer from: https://flexbooks. ck12.org/cbook/ck-12-middle-school- life-science-2.0/section/4.7/primar y/lesson/microevolution-and-macroev olution-ms-ls

age range would be the answer

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.

the tricuspid valve is present between right atrium and right ventricle