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Biology
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How do I explain the process of Natural Selection?

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...

BK
Answered by Ben K. Biology tutor
6164 Views

How do the components of a plasma membrane affect the movement of substances into and out of a cell, and why is this regulation important?

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...

JH
Answered by Joy H. Biology tutor
3072 Views

What is a pathogen?

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

EW
Answered by Erin W. Biology tutor
3259 Views

Why does an increased heart rate during exercise help muscles contract?

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...

AD
Answered by Adam D. Biology tutor
8644 Views

How is the concentration of sodium altered in a cell in the intestines and why is glucose absorption affected?

Imagine a cell like a rectangle, of which one side has finger-like projections (this side faces the intestinal lumen) called the villi, and the other side is flat - the base membrane of that cell that is....

AT
Answered by Antonis T. Biology tutor
2713 Views

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