Extracted Grade 9 Biology Worksheet Questions

Front

What are common features of animals?

Back

All animals are diploid, heterotrophic, multicellular, have no cell wall, and reproduce sexually.

Front

Why are animal gametes haploid?

Back

Front

Which phrase describes radial symmetry?

Back

Body parts arranged around a central axis with multiple planes producing similar halves.

Front

What type of animal symmetry also includes the formation of a head? What is this process called?

Back

Bilateral symmetry; cephalization.

Front

Which phylum does Trichoplax adhaerens belong in?

Back

Placozoa

Front

What cells are located in the center of Trichoplax adhaerens?

Back

Fiber cells

Front

What is the purpose of the osculum in sponges?

Back

To expel water from the sponge after filtration.

Front

Why are ostia important to sponges?

Back

They allow water to enter the sponge for filter feeding and gas exchange.

Front

Which of the following is a stinging cell that is a distinguishing feature of all cnidarians?

Back

Cnidocyte

Front

Which organelle is a small barbed harpoon containing toxins found in cnidocytes of cnidarians?

Back

Nematocyst