invertebrates Flashcards
(41 cards)
What are invertebrates?
Animals without a backbone.
True or False: All invertebrates are aquatic.
False.
Name one characteristic that distinguishes invertebrates from vertebrates.
Invertebrates lack a spinal column.
Which phylum includes jellyfish and corals?
Cnidaria.
What is the largest phylum of invertebrates?
Arthropoda.
Fill in the blank: Invertebrates can be classified into __________ main groups.
nine.
What type of symmetry do most echinoderms exhibit?
Radial symmetry.
True or False: Mollusks have a hard outer shell.
True, but not all mollusks have a shell.
Give an example of a cephalopod.
Octopus.
What is the primary characteristic of annelids?
Segmented bodies.
Which invertebrate group is known for having jointed limbs?
Arthropods.
Name a feature that is common in all cnidarians.
Stinging cells called cnidocytes.
What type of body plan do flatworms exhibit?
Bilateral symmetry.
True or False: All invertebrates reproduce sexually.
False; some reproduce asexually.
Which invertebrate group includes earthworms and leeches?
Annelida.
Fill in the blank: Arthropods have an exoskeleton made of __________.
chitin.
What is the primary habitat of most sponges?
Aquatic environments.
What is a key characteristic of nematodes?
They have a cylindrical body shape.
Which invertebrate group is known for their complex nervous system and behavioral patterns?
Cephalopods.
True or False: Invertebrates can be found in both marine and terrestrial environments.
True.
What is the role of a mantle in mollusks?
It secretes the shell and aids in respiration.
Name one type of echinoderm.
Starfish.
What is the defining characteristic of poriferans?
They are porous and lack true tissues.
Fill in the blank: __________ are known for their ability to regenerate body parts.
Starfish.
