ANSWER FOR BRAINLEST

What can scientists infer about the period of very early Earth from the lack of fossilized remains of oxygen breathing animals and the dominance algae?

A)everything was underwater
B)the atmosphere lacked oxygen
C)only fish lived during that time
D)the dinosaurs used all the oxygen

the answer is d.) homologous; have mammary glands

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.