Unit 2 Biology
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- Created by: Victoria
- Created on: 28-04-13 21:04
Name an advantage of the light microscope?
living animals and plants can be seen directly. They are also cheap
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Name a disadvantage of the light microscope
Has limited powers if magnification and resolution
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Name an advantage of the electron microscope
Huge powers of magnification and resolution
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Give a disadvantage of the electron microscope
very expensive
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What are the typical parts in a prokaryotic cell?
Flagellum, Glycogen granules, mesosome, small ribosomes, cell membrane and cell wall, plasmids, nucleoid
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what happens at a mesosome?
Respiration
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What type of cell is an animal cell?
Eukaryotic
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What two things make the protoplasm
cytoplasm and the nucleus
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Why does a nucleus have pores?
so chemicals can pass in and out to control the events in the cytoplasm
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what are the nucleic acids inside the nuclear membrane?
deoxyribonucleic acid (DNA)
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what are the proteins found inside the nuclear envelope?
ribonucleic acid (RNA)
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What is the aim of mitochondria?
to provide energy for respiration?
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What are the centrioles involved in?
cell division
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What does the rough endoplasmic reticulum have on its surface?
Ribosomes
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What does the RER do?
the ribosomes make proteins. The RER then transports the proteins once they have been made
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What does the golgi body do?
Takes proteins from the RER, assembles and packages them and transports them to where they're needed
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Define Tissue
specialized cells which are organised into a group of cells
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what are the 4 main tissue types in the human body?
connective tissue, epithelial tissue, muscle tissue and nervous tissue
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Name the different kinds of epithelial tissue
Compound stratified, glandular, ciliated, columnar, cubodial, simple squamos
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Which type of epithelial tissue is commonly found lining the surfaces of blood vessels?
Squamos epithelium
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What is an organ?
A group of tissues grouped into a structure so they can work effectively together
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What does xylem do?
Xylem tissue carries water and dissolved minerals from the roots to the photosynthetic parts of the plant
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In what direction does xylem always travel?
Upwards
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What does phloem do?
It transports the dissolved product of photosynthesis (sucrose) from the leaves to where its needed for growth or storage of starch
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What is translocation?
The movement of substances around plants
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What is transpiration?
the loss of water vapour from the surface of a plant
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What is an ecosystem?
an environment that includes different organisms interacting together.
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What does an ecosystem consist of?
a network of habitats and the communities of organisms associated with them
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What is a habitat?
The place where the organisms live
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What is a community?
all the populations of living organisms living in a habitat at one time
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What is a population?
a group of organisms of the same species, whicb live and breed together in a particular niche.
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Other cards in this set
Card 2
Front
Name a disadvantage of the light microscope
Back
Has limited powers if magnification and resolution
Card 3
Front
Name an advantage of the electron microscope
Back
Card 4
Front
Give a disadvantage of the electron microscope
Back
Card 5
Front
What are the typical parts in a prokaryotic cell?
Back
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