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A oxygen makes the red show more easily than carbon dioxide because carbon is black and darkens the colour of the blood.

A CO₂ dyes the blood darker than O₂ does.

Effects of carbon monoxide:
Red blood cells can be reversed but carbon monoxide will not leave the red blood cells.

The glomerulus takes out the parts it thinks it needs to take out.

Homeostasis: the body's way of controlling the climate.

Less urine was produced on a warm day because:
- he was retaining sweating moisture to keep him cool
- sweat and urine are the same thing
- sweat is cool

Negative feedback is when the feedback does not happen as there is something wrong.

When wearing wet clothes on a windy day :
- the wind turns the wet into cold
- your body heat is evaporated out
- you may get ammonia

In diabetes the prostate gland does not produce any insulin.

Solution to a kidney problem: kidney transport.

Functions of a fermentation lock:
- to trap natural air inside the wine
- it ensures that excess air does not get in
- it ensures that wrong air does not disturb the process
- to stop the organism that is fermenting from escaping

Budding is
- when an organism has another organism growing out of it, which should soon detach itself
- when 2 bits fuse so they can multiply
- expanding its given load

Q What does an omnivore eat?
A both meat and vegetables
A carnivores

If all the greenflies were killed, how would this affect the rose bushes and ladybirds?
- ladybirds would weaken
- rose bushes would die because no one would eat them
- rose bushes would grow prettier and ladybirds would migrate to other countries

Difference between pyramid of numbers and pyramid of biomass:
pyramid of biomass can stay the same as it goes up


Concentration of carbon dioxide (read from graph):
350 million parts

Explanations of the greenhouse effect
- when hot air rises, CO₂ gets trapped
- The atmosphere is made of CO₂ and is getting thicker
- CO₂ has thickened the atmospere so is letting less heat out
- increased birth rate
- spraying crops with insect repellent

Function of iodine solution when examining plant cells under the microscope:
to brighten the picture

Part of the microscope: thick tune focus

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