Which era is characterized by stromatolites as the most abundant fossil

Carol and Maria spread some dirt out in a flat pan. Their classmate Ben blew over the dirt with a straw. Some of the dirt moved and formed ruts and bumps. They propped up one end of the pan with a board so the dirt looked like a big hill.

How does food provide a source of energy for living things

You are looking at bacterial cells through a compound light microscope. the objective you are using magnifies objects at 40x, and the ocular magnification is 10x. what is the total magnification of the bacteria cells?

Benefits of flies laying eggs on open wounds

Catastrophism, meaning the regular occurrence of geological or meteorological disturbances (catastrophes), was Cuvierʹs attempt to explain the existence of A) evolution. B) the fossil record. C) uniformitarianism. D) the origin of new species.

Peter has just had surgery and is on nasogastric suction. this involves removing fluids from the stomach through a tube. the new intern does the suction a little too enthusiastically and removes too much hcl. what do you think will happen to the ph?

The 68-year-old client states, "i have been taking aspirin on occasion for my arthritis for many years but notice that it takes longer for it to start working now." what is the best response by the nurse?

The mid-ocean ridge is formed by the long accumulation of ocean floor sediments and millions of years of their subsequent folding and faulting. a. True b. False

What is found in all adult exhinoderms

What is meant by the following statement? The cell membrane is said to be fluid.