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38 Cards in this Set

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