Biology: B2a

gi2008
Mind Map by , created over 5 years ago

Mind Map on Biology: B2a, created by gi2008 on 04/06/2014.

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gi2008
Created by gi2008 over 5 years ago
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Biology: B2a
1 Cells
1.1 Plant cell
1.1.1 Cytoplasm: Gel-like substance where most of the chemical reactions take place
1.1.2 Mitochondria: Where respiration takes place
1.1.3 Nucleus: Contains genetic material that controls the activities of the cell
1.1.4 Ribosomes: Where proteins are made
1.1.5 Cell membrane: Holds the cell together and controls what goes in and out
1.1.6 Cell wall: Made of cellulose, supports and strengthens the cell
1.1.7 Vacuole: Contains cells sap (a weak solution of salts and sugars)
1.1.8 Chloroplasts: Where photosynthesis occurs which makes food for the plant
1.2 Animal cell
1.2.1 Nucleus: Contains genetic material that controls the activities of the cell
1.2.2 Cytoplasm: Gel-like substance where most of the chemical reactions take place
1.2.3 Cell membrane: Holds the cell together and controls what goes in and out
1.2.4 Mitochondria: Where respiration takes place
1.2.5 Ribosomes: Where proteins are made
2 Diffusion
2.1 "The spreading out of particles from an area of high concentration to low concentration"
2.2 Happens in liquids and gases
2.3 Dissolved substances can move in and out of a cell via diffusion
2.4 Big molecules like proteins and starch can't fit through the cell membrane
2.5 Molecules that can dissolve through the cell membrane eg. oxygen, glucose, amino acids and water
3 Specialised cells
3.1 Palisade leaf cell
3.2 Sperm cell
3.3 Egg cell
3.4 Red blood cells
3.5 Guard cells
4 Cell organisation
4.1 Cell
4.1.1 Tissue
4.1.1.1 Organ
4.1.1.1.1 Organ system
5 Plant structure and photosynthesis
5.1 Parts of a plant leaves (tissues etc.)
5.1.1 Mesophyll tissue: Where most of the photosynthesis occurs
5.1.2 Xylem and phloem: Transport water, mineral ions and sucrose
5.1.3 Epidermal tissue: Covers the whole plant
5.2 The rate of photosynthesis
5.2.1 Carbon dioxide + water ---> glucose + oxygen
5.2.2 Limiting factors (depending on environmental conditions)
5.2.2.1 Light (at night)
5.2.2.2 Sometimes carbon dioxide
5.2.2.3 Temperature in winter
5.2.3 Enzymes denature if the temperature is too high or low
5.3 How plants use glucose
5.3.1 For respiration
5.3.2 Making cell walls
5.3.3 Making proteins
5.3.4 Stored as starch
5.3.5 Stored in seeds
6 The distribution of organisms
6.1 Organisms live in different places because the environment varies
6.1.1 This depends on temperature, availability of water, availability of oxygen and carbon dioxide, availability of nutrients and water, amount of light etc.
6.2 Quadrats are used to study the distribution of small organisms
6.3 Transects are used to study the distribution of organisms along a line

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