Biology

  • Created by: Stacey
  • Created on: 14-03-13 22:02
What is an ecosystem?
Made up of living and non living things. Community + Habitat = ecosystem
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What is a herbivore?
Animals that only eat plants
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What is a carnivore?
animals that only eat animals
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What is the plant life cycle?
Germination - Development - Flower Formation - Pollination - Fertilisation - Seed/Fruit Formation - Seed Dispersal
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What are the parts of the seed structure?
Seed coat, Food Store, Embryo
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What does the stigma do?
catches pollen grains
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What does the petal do?
attracts insects
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What does the ovary do? (in plants)
contains the ovules
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What does the sepal do?
Protects the flower bud
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What does the anther do?
Produces pollen grains
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What does he nectary do?
Produces nectar, a sugary liquid that attracts insects
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What are some of the differences between insect pollinated flowers & wind pollinated flowers?
insect pollinated - petals are brightly coloured & stamens are inside the flower and Wind pollinated flowers - small dull petals, no nectar is produced
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Advantage & Disadvantage of Asexual Reproduction?
A - early quick growth is possible because there's no vulnerable stages involved D - weak characteristics can be passed on as there's no variation
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Advantage & Disadvantage of Sexual Reproduction?
A - Reduces competition arisin from dense growth around the parent D - involves many vulnerable stages which the young plant may not survive
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Three Methods of Artificial Propagation?
Cuttings, Grafting & Layering
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What is the photosynthesis equation?
Carbon Dioxide + Water ----> Glucose + Oxygen
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What do molars do?
grind and chew your food
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What do premolars do?
Also chew up your food
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What do canines do?
Tear your food
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What do incisors do?
Bite your food
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What is the function of the large intestine?
Receives any food that has not veen absorbed into the blood. The remaining solid food turns into faeces
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What is the function of the small intestine?
Where digestion is completed and dissolved food is absorbed into the bloodstream
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What does the rectum do?
where the faeces are stored before they leave the body via the anus
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What is peristalsis?
When food is move through the digestive system by the action of muscles in the gut wall
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How is the baby protected inside the uterus?
By the amniotic sac filled with amniotic fluid
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What does an animal cell contain?
cell membrane, cytoplasm, nucleus
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What does a plant cell contain?
chloroplasts, cell wall, cell membrane, cytoplasm, vacuole
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What is diffusion?
The movement of molecules from a region of high concentration to a region of low concentration
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What is osmosis?
The movement of water molecules from an are of high water concentration to an area of low water concentration
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What is the word equation for aerobic respiration?
glucose + oxygen -----> carbon dioxide + water + energy
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What joins muscles to bones?
Tendons
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What joins bones to bones?
Ligaments
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What does red blood cells do?
They carry oxygen to all the cells of the body. They contain haemoglobin, oxygen combines with haemoglobin to form oxy-haemologlobin
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What does white blood cells do?
Their main function is defense against disease
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What does the iris do?
changes size of the pupil in different light intensities
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What does the pupil do?
allows light to enter the eye
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What does the cornea do?
bends the light as it enters the eye so that it can be focussed on the retina
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What does the lens do?
focuses ligt on the retina
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What does the retina do?
contains the light sensitive cells
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What does the optic nerve do?
Carries messages from the light sensitive cells to the brain
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What is the function of the ear drum?
vibrates when sound waves reach it
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What is the function of the semicircular canals?
help keep balance
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What is the function of the middle ear bones?
Carry vibrations from the ear drum to the cochlea
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What is the function of the auditory nerve?
Caries messages from the vibration sensitive cells to the brain
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What does the cochlea do?
Contains cells which are sensitive to vibrations
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What are the 2 parts of the central nervous system?
spinal cord & the brain
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What does the cerebrum do?
controls memory, personality, reasoning etc
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What does the medulla do?
Controls heart & breathing rate
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What does the cerebellum do?
Controls coordination and balance
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What does genotype mean?
the type of alleles an organism carries
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What does homozygous mean?
when two alleles are the same
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What does heterozygous mean?
when the two alleles are different
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How do veins carry blood?
They carry the blood back to the heart from the body cells & tissues
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How do arteries carry blood?
They carry blood away from the heart towards the body
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What do capillaries do?
They take in waste products and have a large surface area for exchange of materials
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Other cards in this set

Card 2

Front

What is a herbivore?

Back

Animals that only eat plants

Card 3

Front

What is a carnivore?

Back

Preview of the front of card 3

Card 4

Front

What is the plant life cycle?

Back

Preview of the front of card 4

Card 5

Front

What are the parts of the seed structure?

Back

Preview of the front of card 5
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