Science

Nota:

• All living organisms carry out these seven life processes: Movement, Respiration, Sensitivity, Nutrition, Excretion, Reproduction, and Growth.

Nota:

• Animal and plant cells share: A cell surface membrane, cytoplasm, and a nucleus.
• Plant cells don't share these with animal cells: A cellulose cell wall, a large vacuole, chloroplasts, and the starch storage granules.
• Animal cells don't have anything that they share with plant cells

Nota:

• CILIATED EPITHELIAL CELLS can trap dust and microbes and move them out of the breathing system.
• MUSCLE CELLS can use energy to get shorter - when they do this they can move bones.
• SPERM CELLS  can swim to an EGG CELL so that fertilisation can take place.
• NERVE CELLS are long and thin. They carry messages from one part of the brain to another. This helps to co-ordinate all the different activities around the body.
• PALISADE CELLS in the leaf contain many chloroplasts and can carry out photosynthesis very efficiently.
• ROOT HAIR CELLS can absorb water and minerals from the soil.