PSSA PSSA Life Science 2

Question 1

What is the function of the nucleus in a cell?

Accepted Answer

To control the cell's activities and store DNA

Answer

The nucleus serves as the control center of the cell, containing DNA and directing cellular activities.

Question 2

Which of the following best describes natural selection?

Accepted Answer

Organisms with favorable traits are more likely to survive and reproduce

Answer

Natural selection is the process by which individuals with favorable traits survive and reproduce more successfully, passing those traits to offspring.

Question 3

What is the difference between a vertebrate and an invertebrate?

Accepted Answer

Vertebrates have a backbone; invertebrates do not

Answer

Vertebrates have a backbone (vertebral column), while invertebrates lack this internal skeletal structure.

Question 4

Which body system is responsible for fighting disease and infection?

Accepted Answer

Immune system

Answer

The immune system defends the body against pathogens such as bacteria, viruses, and other harmful invaders.

Question 5

What is photosynthesis' chemical equation?

Accepted Answer

CO₂ + H₂O → C₆H₁₂O₆ + O₂ (with light)

Answer

Photosynthesis converts carbon dioxide and water into glucose and oxygen using light energy: 6CO₂ + 6H₂O + light → C₆H₁₂O₆ + 6O₂.

PSSA - Pennsylvania System of School Assessment Practice Test

PSSA - Pennsylvania System of School Assessment Practice Test

PSSA PSSA Life Science 2