Describe protective adaptations against predation and define pollution and state human activities causing it.

b) Six protective adaptations used by animals against predation and one example of each:

• Camouflage: Animals blend in with their surroundings to avoid being detected by predators. Example: A chameleon changes its skin color to match the leaves or branches it is on.
• Mimicry: A harmless species evolves to imitate the warning signals of a harmful species to deter predators. Example: Some hoverflies have black and yellow stripes, mimicking wasps, which are dangerous.
• Warning Coloration (Aposematism): Bright, conspicuous colors or patterns signal to predators that an animal is toxic, venomous, or unpalatable. Example: Poison dart frogs have vibrant colors to warn predators of their toxicity.
• Spines or Armor: Physical defenses that make an animal difficult or painful to attack. Example: A porcupine has sharp quills that deter predators.
• Chemical Defenses: Animals release noxious or toxic substances to repel or harm predators. Example: A skunk sprays a foul-smelling liquid when threatened.
• Flight/Escape: The ability to quickly flee from a predator. Example: A gazelle runs at high speeds to escape a cheetah.

a) Pollution is the introduction of harmful substances or products into the environment, causing adverse effects on living organisms and the ecosystem. These substances, called pollutants, can be natural or man-made.

b) Six human activities which cause pollution:

• Industrial Emissions: Factories release smoke, gases (like sulfur dioxide and nitrogen oxides), and particulate matter into the atmosphere.
• Burning of Fossil Fuels: Combustion of coal, oil, and natural gas in vehicles, power plants, and homes releases greenhouse gases (e.g., carbon dioxide) and other air pollutants.
• Agricultural Practices: Use of pesticides, herbicides, and fertilizers can contaminate soil and water bodies through runoff.
• Deforestation: Clearing forests reduces the number of trees that absorb carbon dioxide, leading to increased atmospheric CO2 levels and soil erosion.
• Improper Waste Disposal: Accumulation of solid waste (plastics, electronics) in landfills or oceans leads to soil and water contamination.
• Mining Activities: Extraction of minerals can release toxic chemicals and heavy metals into the environment, polluting soil and water.