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38 Cards in this Set
- Front
- Back
What is a cell?
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A cell is a unit of protoplasm surrounded by a cell membrane.
It is the building block which makes up living things. A cell is very small. |
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What other name is given to a living thing.
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A living thing is also called and organism.
some organisms are unicellular and others are multicellular. |
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Give examples of Unicellular
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Unicellular: spira gyra and paramecium, amoeba
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Give examples of Multicellular.
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Multicelluar:humans, animals and insects.
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What determins the size of an organism?
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The number ofcells in it determins the size.
smaller organisims contain fewer/less cells than larger organisms. |
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Name of an extremely high powered microscope.
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An electron microscope.
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Functions of the different organelles in a cell.
Cell wall |
cell wall gives the cell a fixed shape.
Supports cell, prevents it from bursting. |
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Cell membrane
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Cell membrane controls what goes in and out of the cell.
It is selectively permeable. |
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What is another name for the cell membrane?
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Plasma membrane.
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Chloroplast
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Chloroplast- contains chlorophyll which traps sunlight.
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How does the plant get its food?
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The energy from the plant is used for making food for the plant through the process of photosynthesis.
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Nucleus
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The brain of the cell.
Contains chormosomes which carry the genetic information for the cell. |
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Nucleolus
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Nucleolus manufactures ribosomes and RNA
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RNA
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Ribonuelic Acid.
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Mitochondria
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Mitochondria-is the power house of the cell.
Energy from the food we eat is released from the mitochondria. |
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Endoplasmic Reticulum
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Endoplasmic Reticulum is a network of membranes and channels.
site of synthesis of Lipids and fats. It transports proteins made by the ribosomes. |
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What are Lipids?
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fatty oily molecules=lipids.
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Ribosomes
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The site of protein synthesis
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What is synthesis?
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The building up of things.
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Golgi bodies
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Secretes substances needed by cells eg enzymes.
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Vacuole
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Stores water
Blows up cell with water- gives it support. Stores sugar, wastes and other substances in a solution called "cell soup" |
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Chromatin Reticulum
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hromatin Reticulum-contians the DNA- molecule of inheritance.
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What is DNA?
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DNA- is organized into genes -controlls all cellular activities.
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Name the materials and conditions needed in photosynthesis.
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Materials-carbon dioxide,water
Condition-sunlight,chlorophyll |
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Name the product and byproduct of photosynthesis.
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product-glucose
byproduct-oxygen |
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Who are consumers in the food chain?
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Consumers are organisms which depend directly or indirectly on plants for their energy.
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Give an example of a first order consumer and the food it eats.
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grasshopper,eats plants(herbivores)
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_________ consumers eat animals that have eaten other animals,they are ______.Give an example of this.
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Secondary,carnivores,lizards.
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Name the materials and conditions needed in photosynthesis.
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Materials-carbon dioxide,water
Condition-sunlight,chlorophyll |
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Name the product and byproduct of photosynthesis.
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product-glucose
byproduct-oxygen |
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Who are consumers in the food chain?
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Consumers are organisms which depend directly or indirectly on plants for their energy.
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Give an example of a first order consumer and the food it eats.
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grasshopper,eats plants(herbivores)
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_________ consumers eat animals that have eaten other plants,they are ______.Give an example of this.
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Secondary,carnivores,praying mantis.
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What do third order consumers eat and give an example of this?
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they eat animals which have eaten other animals,lizards.
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Who are omnivores?
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omnivores eat animals and plants.eg.humans
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Who are scavengers?
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animals which eat dead and decaying organisms.eg.earthworms
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They bring about dead organisms and wastes and release minerals and other materials to be reused by plants,they are..
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decomposers.eg.fungi
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What are parasites?
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plants or animals feeding on living organisms.eg.tapeworm
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