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Biology
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Compare the structure of prokaryotic and eukaryotic organisms.

Prokaryotic and eukaryotic organisms have some similar structures: cells membranes (selectively permeable membranes surrounding cells and controlling the entry and exit of materials), cytoplasm (the livin...

PT
Answered by Paige T. Biology tutor
4815 Views

Why are enzymes affected by temperature?

At low temperature, there is low kinetic energy (=molecules move more slowly). So, an enzyme and a substrate are less likely to randomly collide with eachother (similarly...

ZN
Answered by Zoe N. Biology tutor
6897 Views

What is a reflex arch?

Reflex arch is a neural pathway that controls a fast, involuntary reflex. The pathway is as follows: 1)Receptors detect a stimuli such as fire or a neddle pricking your finger. 2) Nerve impulses from the ...

MR
Answered by Momna R. Biology tutor
8529 Views

What is ventilation of the lungs and how does it occur?

Ventilation means moving air into and out of the lungs. This depends on a number of factors which we can break down and talk about individually.

The structure of the thorax: An airtight space in th...

RW
Answered by Rebecca W. Biology tutor
6212 Views

Do you have any exam tips for Biology Paper 2?

So one thing I observed in my Biology class was that students would memorise every single piece of inforrmation about each biological process that was written on their 'comprehensive flashcards'. One thin...

LB
Answered by Louis B. Biology tutor
4455 Views

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