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Ask the student: what other option is there? What are the differences between the two? 

Answer: Humans have a small surface area to volume ratio, so diffusion alone is not enough to meet the high m...

VOSSAG V - Variation: all organisms undergo varying amounts of genetic variation due to genetic mutations or environmental factors (such as geographic separation). O - Overpopulation: all...

Phospholipids and proteins regulate the movement of substances through the membrane, thereby allowing the membrane to be selectively permeable. This is important since it allows the c...

An organism that causes disease e.g. bacteria, virus

An increased heart rate will cause an increase in blood flow around the body (increased cardiac output). This means that there will be more oxygen and more glucose being supplied to the muscles. Since oxy...