The organism in the environment

Question 1

Describe the meaning of the term ‘community’. (2)

Answer 1

A community is all the living organisms(1) living in one habitat at one time(1) where they can depend on each other. (1)

Question 2

What is meant by interdependent in a food web (2). I

Answer 2

If the organisms in a food web are said to be interdependent, it means that all the organisms rely on each other (1) and that if there were changes in the species, it will also affect the other population of the species (1)

Question 3

Some species of lichen are formed from a mutualistic relationship between fungi and photosynthetic algae.

Give two abiotic factors which would impact the growth of these lichens (2).

Answer 3

Temperature (1) and light intensity (1)

Question 4

Genetic modification is a process used to improve crop yield.

Describe the role of a named vector in the process of genetic modification. (2)

Answer 4

A plasmid(1) is used to carry recombinant DNA into the new organism (1)

Question 5

Explain how a shortage of one named mineral could affect the size of plants in the fields (2)

Answer 5

A mineral shortage could affect the size of plants if there’s a shortage in magnesium (1), there will also be a shortage of chlorophyll (1) meaning that there’s going to be stunted plant growth