PSSA Life Science Flashcards
6 cards from real PSSA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 PSSA Life Science flashcards as text
What is the term for organisms that can only be seen with a microscope?
Answer: Microorganisms
Microorganisms (or microbes) are living things too small to be seen with the naked eye, requiring a microscope.
What is biodiversity?
Answer: The variety of different species and ecosystems in an area
Biodiversity refers to the variety of life, including the diversity of species, genes, and ecosystems in a given area.
Which of the following is an example of a biotic factor in an ecosystem?
Answer: Bacteria
Biotic factors are the living components of an ecosystem; bacteria are living organisms, making them biotic.
What type of cell division produces reproductive cells (sperm and eggs)?
Answer: Meiosis
Meiosis is the type of cell division that produces reproductive cells (gametes) with half the normal number of chromosomes.
Which of the following correctly describes the relationship in a parasitism?
Answer: One organism benefits at the expense of the other
In parasitism, one organism (the parasite) benefits while causing harm to the host organism.
What is the role of ribosomes in a cell?
Answer: To synthesize (build) proteins
Ribosomes are the cellular structures responsible for synthesizing proteins by translating messenger RNA.