The mass extinction that was most likely caused by the formation and retreat of glaciers was the ___ extinction

A. Cretaceous - Tertiary

B. End Triassic

C. Permian - Triassic

D. Late Devonian

E. Ordovician - Silurian

Simple diffusion is an example of what kind of cellular transport? O A. Active transport O B. Endocytosis O C. Passive transport O D. Osmosis

When you exercise, you breathe harder and faster. Using your knowledge of organelles, explain why this happens.

What is the full name of ATP?

How do we use more energy when we are sleeping?

Job on enzyme, substrate and active site

During replication the strands of a double stranded dna molecule separate when the bonds are broken between their paired bases. explain why, in terms of the genetic code, is it important that the molecule separate between the bases

In a metabolic pathway, a typical control mechanism is to have:

Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?

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?