Units of Life
What is diffusion?
The movement of particles from an area of high concentration to an area of low concentration
What is asexual reproduction in plants?
A method of reproduction that does not involve the fusion of gametes, resulting in offspring that are genetically identical to the parent plant.
What is photosynthesis?
The process by which green plants use sunlight to synthesize foods with the help of chlorophyll.
What is a conductor of electricity?
A material that allows the flow of electric charge.
What is pollution?
The introduction of harmful substances or products into the environment.
What is the role of the cell membrane?
It regulates the movement of substances in and out of the cell.
Name two methods of natural vegetative propagation.
Corms and bulbs etc.
Name two types of nutrients essential for human health.
Carbohydrates and proteins etc.
What is the difference between series and parallel circuits?
In a series circuit, components are connected end-to-end, while in a parallel circuit, components are connected across common points.
Name two types of pollution.
Air pollution and water pollution etc.
Describe the process of osmosis.
The movement of water across a semi-permeable membrane from a region of low solute concentration to a region of high solute concentration.
What is pollination?
The transfer of pollen from the anther to the stigma of a flower.
What is the role of enzymes in digestion?
Enzymes catalyze the breakdown of complex food molecules into simpler substances that can be absorbed.
How do you calculate electrical power?
Power (P) is calculated using the formula P=IV
What are two effects of air pollution on human health?
It can cause respiratory diseases, cardiovascular problems, and other health issues.
Give 2 ways that plant and animal cells differ in structure?
Plant cells have a cell wall and chloroplasts, while animal cells do not.
Describe the process of fertilization in plants.
It involves the fusion of male and female gametes
Describe the process of respiration in humans.
It involves the intake of oxygen and the release of carbon dioxide, producing energy in the form of ATP.
What is the role of a fuse in an electrical circuit?
It protects the circuit from overcurrent by melting and breaking the circuit.
How does recycling help the environment?
It reduces waste sent to landfills, conserves natural resources, and prevents pollution.
What is the importance of cell specialization in multicellular organisms?
It allows for different types of cells to perform specific functions, increasing the efficiency of the organism.
What are the advantages of cross-pollination?
It increases genetic diversity and can lead to healthier offspring.
What are two effects of smoking on the respiratory system?
It can lead to lung cancer, chronic bronchitis, and emphysema.
Describe the process of electrolysis.
It uses electric current to drive a non-spontaneous chemical reaction.
What is 1 cause and 1 effect of ocean acidification?
It is caused by increased carbon dioxide levels, leading to harm in marine life and coral reefs etc.