Biology: Unit B2

  • Cells
  • How Plants Produce Food
  • Energy Flows
  • Enzymes
  • Homeostasis
  • Inheritance
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  • Created by: Louise
  • Created on: 17-12-10 16:37

Animal and Plant Cells

The Structures they have in common:

  • Nucleus - Which controls the cells activities
  • Cytoplasm - Which is where many chemical reactions take place
  • Cell Membrane - Which controls the movement of materials
  • Mitochondria - Which is where energy is released during aerobic respiration
  • Ribosomes - Which is where proteins are made (synthesised)

Plants Cells also have:

  • Ridgid Cell Wall - Which is for support
  • Chloroplasts - Whihc contain chlorophyll for photosynthesis
  • A Permanant Vacuole - Which contains cell sap

MAKE SURE I CAN LABEL A PLANT AND ANIMAL CELL AND THAT I KNOW THE FUNCTION OF EACH OF THEIR PARTS!!!!!

REMEMBER THAT NOT ALL PLANT CELLS HAVE CHLOROPLASTS!!!

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Specialised Cells

When an egg is fertilised it begins to grow and develop.

At first there is a growing ball of cells. Then as the organism gets bigger some of the cells change and become specialised.

There are many different specialised cells e.g.:

  • Some cells in plants may become xylem or root hair cells.
  • Some cells in animals will develop into nerve or sperm cells.

EXAM HINT!!!!

In an exam it is not only important to remeber that there are specialised cells. It is just as important to remember how their structure makes them suitable to carry out the job that they do.

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