Biology EOC Ecology Review Challenge

The video tutorial covers key concepts in ecology, focusing on energy pyramids, energy transfer in food webs, trophic levels, and biomass. It explains how energy decreases as it moves up the trophic levels and discusses the impact of abiotic factors and invasive species on ecosystems. The session concludes with a preview of the next topic on the human body.

What is the main reason for the decrease in energy as we move up the trophic levels in an energy pyramid?

• Higher trophic levels need less energy for hunting.

• Energy is lost through metabolism and heat.

• Producers have less dense tissues.

• Birds of prey store more energy in their muscles.

In a marine food web, which organism is typically the primary consumer?

• Phytoplankton

• Seal

• Krill

• Fish

Why can't fish be the starting point of a food chain?

• Fish are at the top of the food chain.

• Fish are secondary consumers.

• Fish are omnivores.

• Fish are not producers.

Which type of consumer is always a carnivore?

• Omnivore

• Producer

• Secondary consumer

• Primary consumer

What happens to the biomass as we move up the trophic levels?

• It increases.

• It remains the same.

• It decreases.

• It fluctuates.

Which of the following is an example of an abiotic factor?

• Temperature variations

• Competing organisms

• Parasite

• Predators

What does the prefix 'a' in 'abiotic' mean?

• Without

• Life

• Living

• With

What is a likely long-term effect of introducing a snake species with no natural predators into an ecosystem?

• Increase in native snake populations

• Formation of mutualistic relationships

• Decline in native snake populations

• Increase in biodiversity

Which of the following is NOT a characteristic of invasive species?

• They provide food for native predators.

• They have no natural predators in the new ecosystem.

• They out-compete native species for resources.

• They can harm the ecosystem's economy or society.

Which invasive species is affecting the alligator population in the Everglades?

• Kudzu

• Burmese python

• Hydrilla

• Lionfish