PSSA PSSA Life Science 3

Question 1

What is the term for organisms that can only be seen with a microscope?

Accepted Answer

Microorganisms

Answer

Microorganisms (or microbes) are living things too small to be seen with the naked eye, requiring a microscope.

Question 2

What is biodiversity?

Accepted Answer

The variety of different species and ecosystems in an area

Answer

Biodiversity refers to the variety of life, including the diversity of species, genes, and ecosystems in a given area.

Question 3

Which of the following is an example of a biotic factor in an ecosystem?

Accepted Answer

Bacteria

Answer

Biotic factors are the living components of an ecosystem; bacteria are living organisms, making them biotic.

Question 4

What type of cell division produces reproductive cells (sperm and eggs)?

Accepted Answer

Meiosis

Answer

Meiosis is the type of cell division that produces reproductive cells (gametes) with half the normal number of chromosomes.

Question 5

Which of the following correctly describes the relationship in a parasitism?

Accepted Answer

One organism benefits at the expense of the other

Answer

In parasitism, one organism (the parasite) benefits while causing harm to the host organism.

PSSA - Pennsylvania System of School Assessment Practice Test