BIOLOGY

HideShow resource information
The crocodile and crocodile bird are members of food chains in a habitat. State the type of organism that is found at the start of most food chains.
plantae
1 of 7
Using examples, explain how the survival of parasites depends on the presence of other species.
• a parasite is an organism which depends on a host for its survival • without the host benefiting • fleas and headlice • these feed on the blood of other organisms • tapeworms • their action on the human alimentary canal • mistletoe • with its paras
2 of 7
The active compound in cigarette smoke that causes lung cancer is
tar
3 of 7
Explain the effect of breathing in carbon monoxide on the function of the blood.
• carbon monoxide binds with red blood cells • containing haemoglobin • this reduces the oxygen carrying capacity of the blood
4 of 7
Variation may arise due to the geographic isolation of a species. Explain how geographic isolation of members of one species can lead to a new species evolving.
• speciation (1) • different geographical area may have different selection pressures / environmental conditions (1) • those individuals of a species suited /adapted / to this environment will survive and breed (1) • adaptations/genes passed down to
5 of 7
Plants use nitrates to make
proteins
6 of 7
Explain how different types of bacteria act to increase nitrate concentration in the soil.
• nitrogen fixing bacteria (1) • fix nitrogen gas for the plant (1) • decomposing bacteria / decomposers (1) • decompose / break down animal / plant matter / protein / urea (1) • into ammonia (1) • (then) nitrifying bacteria (1) • convert ammonia / n
7 of 7

Other cards in this set

Card 2

Front

Using examples, explain how the survival of parasites depends on the presence of other species.

Back

• a parasite is an organism which depends on a host for its survival • without the host benefiting • fleas and headlice • these feed on the blood of other organisms • tapeworms • their action on the human alimentary canal • mistletoe • with its paras

Card 3

Front

The active compound in cigarette smoke that causes lung cancer is

Back

Preview of the front of card 3

Card 4

Front

Explain the effect of breathing in carbon monoxide on the function of the blood.

Back

Preview of the front of card 4

Card 5

Front

Variation may arise due to the geographic isolation of a species. Explain how geographic isolation of members of one species can lead to a new species evolving.

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Science resources:

See all Science resources »See all Biology resources »