To be meaningful, a measurement should have

a: only a unit

b: a prefix and a number

c: a number and a unit

d: only a number

Which factor was most responsible for the production of oxygen by the elodea? a the presence of light stimulated photosynthesis. b the plant contained a large number of mitochondria.

What is the similarities between serine and lysine? (refers to amino acids)

Main function of the digestive system

18. A___ is a chemical substance that organisms require to live.

When a bear moves its forepaw using its bicep the bicep is called the? a. prime mover b. origin c. agonist

Battery disposal is a disadvantage of which form of energy?

If a cell has 4 pairs of chromosomes, after mitosis each daughter cell will have how many chromosomes?

Which two families of flowering plants provide protein for the majority of humans?

A. what are the primary abiotic factors that will affect life underwater? b. Explain how the abiotic factors such as depth, Temperature, and some other mentioned in the questions before affect aquatic organisms.

What is a prokaryote, and when did prokaryotes arise?