PSSA PSSA Life Science 1

Question 1

What is the basic unit of all living things?

Accepted Answer

Cell

Answer

The cell is the basic structural and functional unit of all living organisms.

Question 2

Which organelle is known as the 'powerhouse of the cell'?

Accepted Answer

Mitochondria

Answer

The mitochondria produce ATP through cellular respiration, providing energy for the cell's activities.

Question 3

What is the process by which cells divide to produce two identical daughter cells?

Accepted Answer

Mitosis

Answer

Mitosis is cell division that produces two genetically identical daughter cells, used for growth and repair.

Question 4

Which of the following is an example of a producer in an ecosystem?

Accepted Answer

Oak tree

Answer

An oak tree is a producer because it makes its own food through photosynthesis.

Question 5

What does DNA stand for?

Accepted Answer

Deoxyribonucleic acid

Answer

DNA stands for deoxyribonucleic acid, the molecule that carries genetic information in living organisms.

PSSA - Pennsylvania System of School Assessment Practice Test