B2
- Created by: Littlelozza
- Created on: 25-03-15 16:25
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- B2
- Cells, tissues and Organs
- PLANT CELLS
- CELL WALL : made of cellulose which acts to strengthen and support the cell
- CHLOROPLASTS: contains chloropyll which adsorbs light energy for photosynthesis
- CELL MEMBRANE: controls everything that enters and leaves the cell
- MITOCHONDRIA: where oxygen is used and energy is produced
- RIBOSOMES: makes all protein needed in the cell
- CYTOPLASM: where most chemical reactions take place
- Animal Cells
- CELL MEMBRANE: controls the passage of substances in the cell
- CYTOPLASM: where most chemical reactions take place
- MITOCHONDRIA: where most energy is released in respiration
- NUCLEUS: controls all activity in the cell
- RIBOSOMES: where protein is produced "Protein synthesis"
- Oxygen and other dissolved substances move in and out cells by diffusion
- PLANT CELLS
- Cell division, inheritance, speciation
- MEIOSIS: cells divide to produce gametes and genetically different cells
- Each has half the normal amount of chromosomes
- ALLELES: a gene controlling certain characteristics
- MITIOSIS: cell division resulting in 2 identical daughter cells
- if 2 populations of a species separated a new species can arise
- Natural selection can make them different so they cannot interbreed
- MEIOSIS: cells divide to produce gametes and genetically different cells
- Plants and enviroment
- Chlorophyll in plants adsorbs energy from the sun
- PHOTOSYNTHESIS
- Limiting factors: Light, CO2, temperature and concertration
- CO2 + H20 -------> GLUCOSE + O
- PHOTOSYNTHESIS
- Glucose is needed to supply energy
- Starch and Fat
- Make protein for producing enzymes
- Distribution of different species is dependant on :Oxygen, Temperature, Nutrients, Light and Water
- Chlorophyll in plants adsorbs energy from the sun
- Protein and respiration
- AEROBIC
- Produced with a mix of glucose and oxygen
- ANAROBIC
- Small amounts of energy are released from glucose without oxygen
- protein molecules are long chains of amino acids
- Living organisms release energy from glucose by respiration
- Enzymes are biological catalysts
- Enzymes productivity can be effected by PH and temperature
- Hormones, antibodies and enzymes are examples of protiens
- AEROBIC
- Cells, tissues and Organs
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