Life and Living - 1

• Glucose + Oxygen > Carbon dioxide + water + energy
• C₆H₁₂O₆ + 6O₂ > 6CO₂ + 6H₂O + ATP

Because it breaks down sugars that release energy that animals need to survive.

Carbon dioxide + water >light + clorophyll> glucose + oxygen

In the process of plants creating energy they give off oxygen.

Asexual reproduction allows an organism to reproduce by itself. The offspring are genetically identical to the parents. Sexual reproduction involves a partner.

• Don't need a partner
• It's quick
• Favourable environments will be favourable for the offspring
• Large number of offspring
• Short or no parental care

• No genetic diversity, this makes organisms succeptable to environmental change
• High fatality rate
• Only localised dispersal of offspring
• Less dependant on chance events, e.g pollination

• Creates variety in population
• Offspring can withstand environmental changes
• Disease is reduced by variation
• Wider range of seed dispersal

• More complicated and risky
• A lot of energy invested in reproduction
• A lot of care for offspring

Contains oestrogen and progestogen, stops ovulation.

Very effective.

• Can come with side effects
• Relies on remembering to take it
• No protection from STIs

Stops sperm entering the uterus with a plastic sheath.

No side-effects, helps protect from STIs, widely available.

Ocassionally split or come off.

Relying on own fertility awareness, checking menstruation etc.

No side effects or medical risks.

Hugely ineffective, doesn't protect from STIs.

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