Laying eggs belong to which category of energy use? Maintenance, waste production, movement, growth and reproduction

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled