Bio Starter #70

Which of the following is NOT true about ecosystems with more biodiversity?

• Ecosystems with more biodiversity have a simpler food web.
• Ecosystems with more biodiversity are more stable, resilient, and productive.
• Ecosystems with more biodiversity are less stable, resilient, and productive.
• Ecosystems with more biodiversity have a higher chance of species extinction.

What makes a species an invasive species?

• Invasive species do not impact the economy or human health.
• A species is considered invasive when it is non-native to the ecosystem and causes harm to the environment, economy, or human health.
• An invasive species is always beneficial to the environment.
• A species is considered invasive when it is native to the ecosystem and causes harm.

The variety of all living things in an area is known as

• abiotic factors

• niche
• biodiversity
• carrying capacity

What happens to a stable ecosystem if you loose the keystone species?

• The ecosystem becomes unstable and may experience a decline in biodiversity.
• The ecosystem becomes healthier
• The ecosystem becomes more stable
• The ecosystem becomes more diverse

Habitat fragmentation increases biodiversity.

• True

• False

Which of the following organisms would have the highest biomagnification of mercury based on their trophic level?

• Primary producers like algae
• Herbivores like rabbits
• Decomposers like fungi
• Top predators like sharks or tuna