Nematode Characteristics and Types

Nematodes are among the most diverse animal species on Earth, ranging from microscopic sizes to several meters in length. They include various types such as roundworms, hookworms, pinworms, and whipworms. Female nematodes are typically longer than males. Their anatomy is unique, with heads exhibiting radial symmetry and bodies showing bilateral symmetry. It is estimated that there could be up to 500,000 types of nematodes worldwide.

Which of the following is NOT a type of nematode?

• Roundworm

• Pinworm

• Hookworm

• Flatworm

What is the maximum length a nematode can reach?

• 1 meter

• 2 meters

• 3 meters

• 4 meters

In nematodes, which gender is typically longer?

• It varies by species

• Both are the same length

• Female

• Male

What type of symmetry do nematode heads exhibit?

• Spherical symmetry

• Asymmetry

• Radial symmetry

• Bilateral symmetry

Approximately how many types of nematodes are estimated to exist?

• 1,000,000

• 500,000

• 100,000

• 50,000