Roundworms

What is the phylum of roundworms?

• Platyhelminthes

• Nematoda

• Annelida

• Arthropoda

What is the main difference between roundworms and flatworms?

• Roundworms have a pseudocoelom, while flatworms do not.

• Roundworms have a complete digestive system, while flatworms do not.

• Roundworms have a hydrostatic skeleton, while flatworms do not.

• Roundworms have a tough cuticle on their body, while flatworms do not.

How do roundworms reproduce?

• Asexually through binary fission.

• Sexually with separate male and female adults.

• By laying eggs that hatch into larvae.

• By producing spores that develop into adults.

Which of the following is a parasitic roundworm that infects the human intestine and has cutting plates that help it to feed on the blood?

• Pinworm

• Hookworm

• Flatworm

• Tapeworm

Which of the following is a parasitic roundworm that infects by the female, living inside the body, will lay eggs around anus and make the area itchy?

• Pinworm

• Hookworm

• Flatworm

• Tapeworm

How do humans become infected with pinworms?

• By ingesting pinworm eggs.

• By inhaling pinworm larvae.

• By direct contact with infected individuals.

• By consuming contaminated food or water.

What is the role of free-living (non-parasitic) roundworms in the carbon cycle?

• They break down organic matter by decompsoing.

• They produce carbon dioxide.

• They convert carbon dioxide into oxygen.

• They absorb carbon dioxide from the atmosphere.

Why are platyhelminthes and nematodes classified in different invertebrate phyla?

• Because they have different body shapes.

• Because they have different reproductive systems.

• Because they have different feeding habits.

• Because they have different types of skeletons.

What is the function of the cuticle in roundworms?

• To protect the body.

• To aid in locomotion.

• To facilitate gas exchange.

• To store nutrients.

How do roundworms obtain nutrients?

• By photosynthesis.

• By absorbing nutrients through their body wall.

• By hunting and consuming other organisms.

• By producing their own nutrients through chemosynthesis.