What process is oxygen going in and water coming out? is it electron transport

What are some aquatic organisms that live in cold water temperatures?

Four types of motile cells in human body?

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2