Invertebrate Test Flashcards
(28 cards)
What are the characteristics of animals?
- Multicellular organisms sharing similar features and made of different types of cells.
- Their cells have a nucleus and organelles surrounded by a membrane – EUKARYOTIC.
- Cannot make their own food – HETEROTROPHIC – digest their food.
- Can move from place to place to find food, shelter, and mates, and can escape predators.
What are the characteristics of invertebrates
- has no backbone
- Can be found on land or in water environments.
Insects and some other invertebrates have exoskeletons.
What is the body arrangement in bilateral symmetry
parts are mirror images of each other
What are the physical characteristics of a proifera?
- Most are found in the ocean.
- They look like plants but they are animals.
- Sponges stay fixed in one place
- Their bodies are full of pores and their skeleton is made of spiky fibers (spicules) or rubbery spongin.
- Have no true tissue.
- Water flows through the pores of their body, aided by flagella, which enables them to catch food – FILTER FEEDERS
- reproduce sexually or asexually
sponges reproduce sexually or asexually
can produce either sexually (releasing sperm) or asexually (budding)
what is a gemmule
a new sponge that grows from pieces of an old sponge
What are the characteristics of the cnidarians? What are the body shapes of the cnidarians?
- All cnidarians have stinging cells called NEMATOCYSTS in tentacles surrounding their mouths.
- Cnidarians are more complex than sponges.
- They have complex tissues, a gut for digesting food, and a nervous system.
- They come in two body shapes, the medusa and the polyp.
- reproduce both asexually (budding) or sexually (releasing sperm)
How does asexual reproduction occur in the cnidarian?
budding
How do the sea anemones and coral feed?
by catching tiny animals in their tentacles
characteristics about hydras
- They live in freshwater.
- Hydras have tentacles that catch their food.
- They move from place to place.
- Hydras are very small animals.
- Reproduce asexually by budding
What is the body symmetry for a flatworm?
Bilateral: They have a head and a tail, and flattened bodies
How does the tapeworm take in nutrients?
host’s intestines
What are the characteristics of the nematoda (roundworms)
- They have rounded bodies; body is a tube within a tube. Digestive tract has both a mouth and an anus
- They live in damp places. Can also live inside humans and other animals.
- Can make people and animals sick.
- Most wide-spread animal on earth!
What are characteristics of organisms in the phylum Annelida (segmented worms)?
- Their bodies are divided into repeating segments
- They prefer burrowing through moist soil.
how do earthworms exchange gas?
they take in oxygen and expel carbon dioxide directly through their skin
what is the role of leeches?
secrete heparin which prevents blood from clotting
What is the purpose of the mantle in the mollusks?
it’s a thin layer of tissue that covers the mollusk’s soft body and secretes the shell
What type of circulatory system is found in mollusks?
closed circulatory system with blood vessels
What are the characteristics of a gastropod?
- most have one shell
- Live in water or on land
- Move by gliding their large muscular foot along a trail of mucus
What organisms are classified as cephalopods?
octopi and squid
which invertebrate can fly?
What are the stages of incomplete metamorphosis? Complete metamorphosis?
Incomplete:
stage one: egg
stage two: about 2 weeks after it’s a nymph
stage three: 4-7 weeks and it turns into an adult
Complete:
stage one: egg
stage two: larva
stage three: pupa
stage four: adult
What is the purpose of the numerous legs on the centipede and millipede?
run from enemies
List the physical characteristics of the phylum Echinodermata?
- Radial symmetry
- Top side=Arboral Bottom side = Oral
- Diets vary ~ predators, filter feeders, some eat rotting material
- Spiny skin covering an internal skeleton of plates
- Water-vascular system to help them move and eat
- Some can reproduce through regeneration from parts.
