biology - cells, tissues, and organs

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in which part of the cell is energy released during respiration?
mitocondria
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why is it possible to see a bacterial colony but not a single bacterium?
one bacterium is very tiny but many bacteria massed together in a colony can be seen
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why do muscle cells need lot of mitochondria?
mitochondria release energy which muscles need for movement
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what determines net movement of particles across a cell membrane?
the concentration on each side of the membrane
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what do glandular tissues produce?
enzymes and hormones
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where is soluble food absorbed?
small intestine
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where does the energy for photosynthesis come from?
sunlight
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why do enzyme reactions slow down?
when the temperature falls enzymes work slower
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what is meant by the term 'dependant variable'?
the variable that is being measured
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name three substances used for storage in plants
starch, fats and oils
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what factors must be controlled in a greenhouse to improve plant growth?
light, temperature and carbon dioxide
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why are there so few animals living in cold regions such as the arctic?
very few plants grow there, and the ones that do are small so there's very little food for animals
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what is a quadrat?
a square frame which may be divided into a grid
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what re proteins made out of?
amino acids
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what is meant by denatured?
the enzyme changes shape and stops working
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which enzyme digests starch?
anylase
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where is bile produced?
in the liver
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which enzyme is used to convert glucose into fructose?
iosmerase
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where does aerobic respiration take place?
in the mitocondria
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which sugar is needed by the muscles for aerobic respiration?
glucose
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which type of cell division produces two identical calls from one original cell?
mitosis
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what type of cells are produce by meiosis?
sex cells/gametes such as eggs and sperm
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where are stem cells found in an adult human?
bone marrow
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which scientist worked out how characteristics are in inherited?
Gregor mendel
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which chromosomes are found in human males?
x and y
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what is meant by the term phenotype?
this is the description of the physical characteristics
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name a genetic disorder which is controlled by a dominant gene?
polydactyly
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what is embryo screening?
tests that are carried out on the embryo to diagnose possible disorders
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name a hard part of an animal which will not decay easily?
bones, teeth, shells or claws
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why are some fossils destroyed over time?
due to geological activity which breaks them up or wears them down
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how can a new predator cause extinction of a species?
its eats all the animals
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suggests another factor which could have caused the dinosaurs to die out?
a new disease being introduced into the population
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how do populations become isolated?
islands breakaway from the mainland, new rivers from, mountain ranges or craters separate them.
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what is meant by genetic variation?
the wide range of alleles that control the characteristics in a population
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Card 2

Front

why is it possible to see a bacterial colony but not a single bacterium?

Back

one bacterium is very tiny but many bacteria massed together in a colony can be seen

Card 3

Front

why do muscle cells need lot of mitochondria?

Back

Preview of the front of card 3

Card 4

Front

what determines net movement of particles across a cell membrane?

Back

Preview of the front of card 4

Card 5

Front

what do glandular tissues produce?

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