Explain the sequence of organization on Earth (protobionts, then prokaryotes, then eukaryotes ...).

Describe two factors that cause variations in climate?

Why is the percentage of food eaten a good number to use? explain.

Which region is visible only on the posterior/dorsal body surface?

What is it called when a high percentage of the species on Earth dies off? O A. Founder situation O B. Mass extinction O C. Selective pressure O D. Disruptive selection

Which feature do Mediterranean countries have in common? A. religion B. cuisine C. currency D. language

Which ecosystem demonstrates the lesser biodiversity? Why?

A particular tissue was discovered to have cells that lie in small chambers, separated by a matrix that is solid yet flexible, and fibers that could be stretched while still being able to return to their original length. Name this tissue.

What does the lac operon in bacteria code for?

Egg and sperm are a type of these?

What is Chemical digestion?