Biology Final Exam Practice

This process monitors body conditions and acts to return them to normal levels through feedback loops.

• reproduction

• meiosis

• photosynthesis

• homeostasis

A graph of two populations of organisms increase and decrease together over a period of many years. The ecological relationship between these two species is

• competition

• predator/prey

• unclear

• exponential

Which macromolecule is a double helix found in the nucleus of eukaryotic cells?

• carbohydrates

• DNA

• lipids

• proteins

Carbon dioxide and methane are gases that trap heat around the Earth and cause

• the ozone hole to increase

• an increase in cancer rates

• the Greenhouse Effect

• an increase in the polar ice caps

What causes differences in your phenotype?

• Genes only

• Environment only

• Nothing

• Both genes and your environment effect your phenotype

What happens to enzymes when placed at the wrong pH?

• they denature and will not function

• they fold up and function perfectly

• they fold up correctly, but fail to function

• they denature and begin to function correctly

All organisms have a cell membrane made out of

• proteins only

• phospholipids

• carbohydrates

• nucleic acid

Autotrophs ________________ and heterotrophs ______________.

• make their own food by photosynthesis, eat for food

• eat for food, make their own food by cell respiration

• eat for food, make their own food by photosynthesis

• make food by cell respiration, eat for food

Only bacteria can use this element from the air to make organic molecules

• carbon

• oxygen

• nitrogen

• hydrogen

What is responsible for reaching carrying capacity in a logistic growth curve?

• unlimited resources

• limited resources

• too much available food

• too much available space