Zoo-Ch4.2 Phylum Nematoda

The common name for worms that belong to the Phylum Nematoda

• segmented worms

• roundworms
• flatworms
• earthworms

How many embryonic germ layers are found in the developing nematode worm?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS4-3

What type of symmetry is found in a nematode worm?

• spherical
• asymmetrical
• radial
• bilateral

Nematodes are unique in that they have ​ (a)   body plans, which means that they have ​ (b)   but the internal organs are not lined in connective tissues.

• pseudocoelomate
• acoelomate
• coelomate
• body cavities
• gastrovascular cavities

What type of digestive system is found in a nematode worm?

• Gastrovascular cavity with one opening (mouth)

• Gastrovascular cavity with two openings (mouth and anus)

• True digestive tract with one opening (mouth)

• True digestive tract with two openings (mouth and anus)

T/F: Nematode worms have specialized excretory cells

• True, they are called flame cells

• True, they are called renette cells

• False, they use direct diffusion

Although nematode worms still have hydrostatic skeletons, they are a bit more rigid than flatworms due to their outer ​ (a)   that is made of ​ (b)  

• cuticle
• exoskeleton
• collagen
• chitin
• calcium carbonate

Tags

NGSS.MS-LS4-2

The periodic shedding of the cuticle is known as ______

• shedding
• exfoliating
• ecdysis

• extraction

What is parthenogenesis?

• A form of reproduction in which an egg develops into an embryo without being fertilized by sperm.
• A form of reproduction in which an embryo develops from a sperm without an egg being involved.
• A form of reproduction in which an egg is fertilized by multiple sperm.
• A form of reproduction in which an embryo develops without an egg being fertilized by sperm.

Tags

NGSS.MS-LS3-2

Which of the following are NOT nematode worms?

• Pinworm

• Heartworm

• Ascaris Worms

• Tapeworms

Tags

NGSS.MS-LS4-2