Red blood cells are specialised cells. Why do they have a large surface area?
To make it red
To increase the rate of oxygen diffusion
To destroy pathogens
To prevent carbon dioxide entering
Osmosis is the movement of water through...
The urinary system
A non permeable membrane
A semi permeable membrane
Particles move faster when...
Nutrients are added
Water is added
Heat is added
Sperm cells are specialised cells. They have several adaptations...
Flagella, acrosome, streamlined, lots of mitochondria
Flagella, endosome, streamlined, lots of mitochondria
Flagella, acrosome, streamlined, a few mitochondria
Flagella, endosome, streamlined, a few mitochondria
Diffusion occurs in...
Gases
Liquids and gases
Liquids
Solids, liquids and gases
Which would you not find in an animal cell?
Cell membrane
Nucleus
Vacuole
Mitochondria
Diffusion occurs more quickly when...
There is a shorter travel distance
There is a longer travel distance
Which would you not find in a bacterial cell?
Chromosomal DNA
Flagella
Cytoplasm
Nucleus
Diffusion is the movement of...
water from low concentration to high concentration
a substance from low concentration to high concentration
water from high concentration to low concentration
a substance from high concentration to low concentration
Why do root hair cells not have chloroplasts?
They cannot receive sunlight so cannot photosynthesise
They need more space for the uptake of water