Science CDB1 Review

What are biotic factors?

• Living organisms that directly or indirectly affect an ecosystem.
• Physical features of an ecosystem.
• Chemical substances that affect an ecosystem.
• Non-living elements that affect an ecosystem.

True or False. The fox is in direct competition with the owl.

• True

• False

What would happen to the mountain lions if the fox population decreased?

• Mountain lions will decrease.

• Mountain lions will go extinct.

• Mountain lions will increase.

• Mountain lions will stay the same.

What would happen to the striped bass if the dinoflagellates increased?

• The striped bass will increase because it has less food.

• The striped bass will increase because it has more food.

• The striped bass will decrease because it has less food.

• The striped bass will decrease because it has more food.

What is happening to the copepod population in this graph?

• The copepod is increasing over time.

• The copepod is staying the same over time.

• The copepod population is decreasing over time.

• The copepod became extinct.

What are abiotic factors?

• Living components of an ecosystem that can influence non-living organisms.
• Factors that are only found in aquatic ecosystems.
• Organisms that rely on other organisms for survival.
• Non-living components of an ecosystem that can influence living organisms.

Which species of bird is more adapted to living in an ecosystem where 80% of the food supply has hard shells seeds and nuts?

• Species A - birds with long thin beaks.

• Species B - birds with big thick beaks.

• Species C - birds with needle-like beaks.

• Species D - birds with small beaks.

What will happen to a forest population if a wildfire destroys half the land?

• The forest population will decrease.
• The forest population will increase.
• The forest population will remain the same.
• The forest population will double.

What are artificial reefs?

• Artificial reefs are structures built on land to provide habitat for marine organisms.
• Artificial reefs are natural formations found in bodies of water.
• Artificial reefs are man-made structures placed in the air to promote biodiversity.
• Man-made structures placed in bodies of water to provide habitat for marine organisms and promote biodiversity.

What is agricultural runoff?

• Water carrying pollutants from industrial factories into nearby water bodies.
• Water carrying pollutants from farms into nearby water bodies.

• Water carrying pollutants from mining operations into nearby water bodies.
• Water carrying pollutants from residential areas into nearby water bodies.