Home

Biology

Bioenergetics

Ideal conditions for photosynthesis - Higher

Select Lesson

Exam Board

Select an option

Biology practicals

Investigating specimens using microscopes

Investigating the effect of pH on amylase activity

Investigating molecules in food using food tests

Investigating osmosis in potatoes

Investigating the effect of antimicrobials

Investigating limiting factors of photosynthesis

Investigating the rate of respiration

Using field-work techniques

Ecosystems and material cycles

Ecosystems, competition and environmental changes

Trophic levels and biomass transfer

Human impacts on biodiversity

Conservation and maintaining biodiversity

The carbon cycle

The water cycle

Obtaining potable water

The nitrogen cycle

Pollution indicators - Higher

Decomposition and biogas

Exchange and transport in animals

Specialised exchange surfaces

Factors affecting the rate of diffusion

Human circulatory system

Aerobic and anaerobic respiration

Animal coordination, control and homeostasis

The human endocrine system

Hormones: adrenaline and thyroxine - Higher

Hormones in human reproduction

Treating infertility - Higher

Homeostasis and blood glucose

Controlling body temperature

The urinary system

Plant structures and their functions

Photosynthesis and limiting factors

Factors limiting the rate of photosynthesis - Higher

Water and mineral transport in plants

Plant adaptations

Plant hormones

Health, disease and the development of medicines

The relationship between health and disease

Communicable disease

Sexually transmitted infections

How the body fights disease

Vaccination, immunisation and medicines

Aseptic techniques

Drug development and testing

Monoclonal antibodies and their uses - Higher

Non-communicable diseases

Calculating BMI and the waist-to-hip ratio

Cardiovascular disease and treatment

Plant defences and diseases

Natural selection and genetic modification

Evolution by natural selection

Fossils as evidence for evolution

Classifying living organisms

Selective breeding

Uses and evaluation of genetic engineering

The process of genetic engineering - Higher

Uses of genetic engineering

Genetics

Meiosis, sexual and asexual reproduction

Sexual and asexual reproduction

DNA: structure, genes and chromosomes

Protein synthesis - Higher

Inheritance and genetic diagrams

Inherited disorders

Blood groups, co-dominance and haemophilia

Types and sources of variation

The human genome project

Cells and control

The cell cycle and stages of mitosis

Cell differentiation, stem cells and ethics

The structure of the brain

The nervous system and the reflex arc

The eye: structure, reflexes and defects

Key concepts

Eukaryotic and prokaryotic cells

Specialised animal and plant cells

Types of microscopes and calculations

Enzymes

Calorimetry and energy calculations

Transport systems in cells

Practical skills

Measuring techniques

Safety and ethics

Designing experiments

Methods of heating substances

Working with electronics

Random sampling and sampling methods

Comparing results using percentage change

Working scientifically

The scientific method

Science communication and ethics

Evaluating risks and hazards

Collecting data

Processing and presenting data

Units and equations

Structuring a scientific report and drawing conclusions

Uncertainties and evaluations

Explainer Video

Tutor: Holly

Summary

Ideal conditions for photosynthesis

In a nutshell

Greenhouses can allow farmers and gardeners to create the ideal environment for their plants. This can maximise plant growth and quality as they can ensure there are no limiting factors on photosynthesis and they can reduce the number of pests. However, greenhouses are expensive so the farmers must make sure they don't use too much heat, as this would be wasting money.

Greenhouses

Greenhouses allow you to artificially create an ideal environment for plants to grow well.

Feature	Description
Heaters	Greenhouses trap heat which ensures that temperature is not a limiting factor. At colder times, a heater could be put in the greenhouse and the temperature can be regulated easily.
Lights	Greenhouses can also have lights which can maximise the amount of light that plants receive for photosynthesis. During the winter months when the days are shorter, lights can be turned on to artificially increase the day length.
Paraffin heaters	Paraffin heaters can be used in greenhouses to both increase the temperature and carbon dioxide levels. These heaters burn paraffin to generate heat. Carbon dioxide is produced as a by-product.
Containment	Greenhouses also keep plants in one area and closed off from the environment so there is less chance of disease and pests.
Fertilisers	To encourage plant growth, fertilisers can also be added to the soil.

Costs

Whilst greenhouses clearly benefit plant growth, it is much more expensive to grow plants in greenhouses than in their natural environment. If the conditions are kept just right, then the quality of the plants to be sold will be better. The farmer must balance the costs of the greenhouse with the money they make from selling their plants.

Learn with Basics

Length:

Unit 1

Photosynthesis and plant adaptations

Unit 2

Photosynthesis and limiting factors

Jump Ahead

Optional

Unit 3