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Biology
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What is an Extremophile?

An extremophile is an organism that can live in extreme conditions such as high temperatures, high pressures and high acidity.
An example of an extremophile is Giant tube worms. They live miles b...

EO
Answered by Emily O. Biology tutor
11838 Views

How do plant stomata open and close?

Stomata can be thought of as gates. This is why the size of the guard cells is so important. How the guard cells change in size is a simple matter of how much fluid they can hold - their turgor. Osmosi...

SM
Answered by Sarah M. Biology tutor
48279 Views

Describe how antibiotic resistance occurs.

Firstly, antibiotic resistance has to be gained by a bacterium through the mutation of a gene. This can occur due to, for example, the overuse of antibiotics or failure to complete a full course of ant...

AH
Answered by Anita H. Biology tutor
18519 Views

What is osmosis and why does it occur?

Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration through a partially/selectively perme...

AH
Answered by Anita H. Biology tutor
42617 Views

What are the differences between facilitated diffusion and active transport?

Facilitated diffusion doesn't require ATP whereas active transport does. This is because active transport involves the movement of particles against its concentration gradient, whereas facilitated diffusi...

UT
Answered by Upasana T. Biology tutor
15397 Views

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