Chapter 1 - Cells, Specialised Cells And Reproduction Flashcards
What are cells?
The building blocks of life, which contain structures called organelles. Organelles have specific jobs.
What is the purpose of muscle cells and nerve cells?
Since they are specialised cells, the are enabled to carry out specific tasks more effectively.
What organisms contain only a single cell?
Bacteria and protozoa.
In plant reproduction, which is the male sex cell?
Pollen.
How are flowers adapted to be more appealing to pollinators?
Scent and colour are enhanced to make bees attracted.
What do we rely on to pollinate our crops for food?
Bees and other insects, but some actions put these pollinators at risk.
Why have plants adapted to different mechanisms to disperse their seeds?
For more chance of survival.
What happens once an egg is fertilised?
It develops into a foetus, which grows in the uterus until it becomes a fully grown baby.
What factors affect the growth and developing of a foetus?
Alcohol, cigarettes and drugs.
What is a nucleus?
Sends instructions to all parts of the cell.
What is a cytoplasm?
The jelly-like substance within a cell which helps it keep its shape, all chemical reactions take place here
What is the cell membrane?
Surrounds the cell and contains cytoplasm, keys nutrients, oxygen, food and water into the cell. During chemical reactions, the membrane let’s waste out.
What is mitochondria?
The powerhouse of the cell.
What is the cell wall?
Extra protective layer outside the cell membrane, gives the cell shape and strength.
What is the vacuole?
Large bubble full of liquid, storing water, glucose, nutrients and sodium. It provides internal pressure, keeping it firm and in shape.
