Is oxygen an biotic or abiotic factor?

Which of the following shows the three stages of ecological succession in the correct order? climax community; pioneer species; perennials pioneer species; perennials; climax community perennials; climax community; pioneer species pioneer species;

If the neuron membrane becomes more permeable to Na, Na will transport across the membrane, causing the cell to depolarize. If the neuron membrane becomes more permeable to Na, Na will transport across the membrane, causing the cell to depolarize.

Which functional groups form hydrogen bonds? (Bio 1)

How many times does the heart beat a day

Amoeba sisters video recap: dna vs. rna and protein synthesis whose show is this?

Where do you think this heat lamp is being used?

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.