Biology STAAR Practice #1

Front

What is the primary source of energy in an ecosystem?

Back

Grass/plants are the primary source of energy in an ecosystem, as they perform photosynthesis to convert sunlight into energy.

Front

What is the role of DNA in living organisms?

Back

DNA contains the genetic instructions for the development, functioning, growth, and reproduction of all known living organisms.

Front

What is a genetic mutation?

Back

A genetic mutation is a change in the DNA sequence that can lead to variations in traits among individuals.

Front

How do pesticides affect insect populations?

Back

Pesticides are used to kill pests, but some insects may develop resistance, allowing them to survive and reproduce.

Front

What is the significance of the cell cycle?

Back

The cell cycle is crucial for growth, development, and reproduction in organisms, allowing cells to divide and produce new cells.

Front

What is aerobic cellular respiration?

Back

Aerobic cellular respiration is the process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

Front

What is a phospholipid bilayer?

Back

A phospholipid bilayer is a double layer of phospholipids that makes up the cell membrane, providing structure and protection.

Front

What is the function of mitochondria?

Back

Mitochondria are known as the powerhouse of the cell, as they generate ATP through cellular respiration.

Front

What is natural selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is the difference between a clone and a genetically diverse population?

Back

A clone is an organism that is genetically identical to its parent, while a genetically diverse population has individuals with varied genetic traits.