TED-Ed: Why are there so many insects? - Murry Gans

Insects vastly outnumber humans, with an estimated 10 quintillion individuals and a million known species. They make up 75% of all animals on Earth. Their success is due to rapid reproduction, genetic diversity, and adaptability to extreme environments. Insects occupy diverse ecological niches, feeding on various resources. Metamorphosis allows them to utilize resources efficiently without competition between life stages. Despite their small size, insects are the true conquerors of the planet, thriving in almost every habitat.

How many individual insects are estimated to be on Earth?

• 10 trillion

• 10 quintillion

• 10 quadrillion

• 10 sextillion

What percentage of all animal species on Earth do insects make up?

• 50%

• 60%

• 75%

• 90%

Which of the following is NOT a reason for the adaptability of insects?

• Protective exoskeletons

• Ability to breed rapidly

• Lack of genetic diversity

• Survival in extreme environments

What is a unique feature of metamorphosis in insects?

• It reduces the number of offspring produced.

• It limits the ecological niches insects can occupy.

• It transforms insects to maximize resource use.

• It allows larvae and adults to compete for the same resources.

How do some wasps ensure nourishment for their hatchlings?

• By collecting pollen

• By feeding them nectar

• By laying eggs inside paralyzed insects

• By building nests in trees