Cerrar
What main characteristic do organisms in the chordata phylum have in common?
What do all vertebrates have in common?
What does oviparous mean? Name a group of vertebrates that are oviparous.
What is the name of the offspring of two different species?
In the binomal system each organism is given a two part name. What does each part refer to?
Other than the environment what causes variation?
What is a) continuous variation
b) discontinuous variation
Give an example in humans of both continuous and discontinuous variation.
Explain two ways in which deep sea fish have adapted to their environment.
Explain two ways in which polar bears have adapted to living in polar regions.
Explain darwins theory of natural selection.
Give three ways that the scientific community validate evidence.
What is speciation? Explain how geographical isolation can lead to speciation.
How many pairs of chromosomes are there in a normal human cell nucleus.
What is an allele?
What is meant by an organism being heterozygous?
What about homozygous?
Describe the difference between a recessive allele and a dominant one.
What are the symptoms of cystic fibrosis?
Give two symptoms of sickle cell anameia.
Is the allele for sickle cell anemia dominant or recessive?
What is homeostasis?
Describe how body temperature is reduced when your too hot.
Describe how body temperature is increased when you are too cold.
What are hormones?
How do hormones travel around the body?
What is the name given to chemicals found at synapses?
List four main differences between nerves and hormones...
List the 5 sense organs and the receptors they each contain.
What does CNS stand for
What does the CNS consist of?
What does the CNS do?
What is the purpose of a reflex?
Describe the pathway from stimulus to response.
Describe what happens when blood glucose level is
1) too high
2) too low
Describe the main way which type one diabetes can be controlled.
What does it mean if a person is resistant to insulin?
What is the name given to a plants growth response to light?
What is auxin?
Shoots are positively phototropic. What does that mean?
Roots are positively gravitropic. Explain the role of auxin in this response.
What is gibberellin?
List three things which gibberellin stimulates in plants
Describe how plant hormones are used as selective weed killers.
What is growing cuttings with rooting powder?
How does a stimulant drug work?
Give two examples of stimulants
How does a depressant work?
Describe the harmful effects of
1) nicotine
2) tar
3) carbon monoxide
State two long term effects of drinking too much alcohol.
What is a pathogen?
What is a vector?
State 4 ways pathogens can be spread and give an example of each.
Name one chemical and one physical barrier that defend against pathogens.
What do plants produce to defend themselves against bacteria?
What are antiseptics?
Name two types of antibiotics.
Name one type of bacteria that has developed resistance to certain antibiotics.
Why shouldn't your doctor give you antibiotics for a mild infection?
Where does the energy in a food chain originate? What happens to the energy?
Why are pyramids of biomass always pyramid shape?
What is the difference between a parasitic and mutalistic relationship?
Give examples of parasites
Give examples of mutalistic relationships
Give three ways that increasing human population has a greater effect on the environment.
Explain what eutrophication is.
Give two advantages and two disadvantages of recycling...
What does it mean if you find stonefly larve or freshwater shrimp in a river/
If the river is polluted what will you find in it?
Explain how lichen can be used as an indicator of air pollution.
