Explain the role of the Sun in food chains on Earth

What is biomass and how does it change with each new stage in a food chain ?

The amounts of material and energy contained in the biomass of organisms are reduced at each successive stage in a food chain . Explain how.

Why do materials decay and what can increase the rate of decay ?

Why is the decay process important ?

Describe the carbon cycle

what are detritus feeders

what are chromosomes and where are they found

What do genes do ?

Differences in the characteristics of different individuals of the same kind may be due to differences in what ?

Describe sexual reproduction

Describe asexual reproduction

compare cloning a plans by cuttings and tissue culture

Describe how to clone and animal using embryos

Describe adult cell cloning

describe how to genetically alter an organism

give examples of genetically modified organisms

Give a benefit of genetically modified crops

what concerns are there about gm crops

what is a gene ?

what is carbon from the carbon cycle used to make

why is it more difficult to successfully clone animals than plants

list the benefits and disadvantages of adult cell cloning

what are the benefits of genetically engineering animals

why should you genetically engineer animals (insert a gene ) at an early stage of development

what is meant by the host animal

why does a compost heap get hot

why do we normally eat herbivores rather than carnivores