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48 Cards in this Set
- Front
- Back
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What is the habitat for Mollusca Univalve? (slugs, snails)
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terrestial
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What is the nutrition for Mollusca Univalve?
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herbivores that use a radula to scrape algae off of rocks
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What is the body support for Mollusca Univalve?
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one calcium carbonate shell and move using a muscular foot
coelomates |
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What is the body symmetry for Mollusca Univalve?
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bilateral
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What is the habitat for Mollusca Bivalve? (clmas, oysters, mussels, scallops)
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aquatic
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What is the nutrition for Mollusca Bivalve?
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filter feeders
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What is the body support for Mollusca Bivalve?
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two calcium carbonate shells, move with a muscular foot, have a mantle which secretes the shell, coelomates
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What is the habitat for Mollusca Cephalopod?
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aquatic
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What is the nutrition for Mollusca Cephalopod?
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predators, advanced nervous systems, arms capture prey
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What is the body support for Mollusca Cephalopod?
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internal calcium carbonate shell, move with siphon which squirts water to create movement
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What does a squid use chromatophores for?
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They are in the skin and allow it to change color.
(they are coelmates) |
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What is the body symmetry for Mollusca Cephalopod?
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bilateral
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What are annelids?
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segmented worms including earthworms, leeches, marine worms - invertebrates
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What are the 3 classes of annelids?
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Oligochaeta, Polychaeta and Hirudinea
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What separates the 3 classes of annelids?
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the number of external features such as setae, the bristles on the outside of the worm
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What are Oligochaeta?
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annelids with 4 setae per segment ex. earthworms
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What are Polychaets?
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aquatic worms (ex. featherduster worms)
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What are Hirundinea?
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leeches which may be parasites
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What is the earthworm skeleton called?
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a hyrdostatic skeleton which means the body is filled with fluid
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Where do two earthworms join to reproduce?
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at their clitellums where they secrete a mucus covering
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What happens in the mucus coating when earthworms reproduce?
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the sperm swim through it; the fertilized eggs are released into the mucous and a cocoon forms
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What kind of animals are earthworms? (what job do they do?)
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decomposers
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What do earthworms eat?
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soil
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Name the 6 parts of the earthworm digestive tract?
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pharynx, esophagus, crop, gizzard, intestines, anus
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Which is darker, dorsal or ventral side of an earthworm?
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dorsal
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How many setae are on one segment of an earthworm?
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4
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What does it mean that an earthworm is a hermaphrodite?
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the earthworm contains both male and female reproductive organs.
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How many 'hearts' does an earthworm have?
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5
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How does blood travel through the earthworm's body?
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An earthworm circulates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm. These vessels are the aortic arches, dorsal blood vessels, and ventral blood vessels.
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What structures make the eggs and sperm in an earthworm?
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ovaries and testes
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What is the earthworm clitellum?
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a thickened glandular section of the body wall that secretes a viscid sac in which the eggs are deposited
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How do earthworms move?
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waves of muscular contractions which alternately shorten and lengthen the body
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Name the 3 classes of annelids
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oligochaeta, hirudinea, clitellates
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Why are leeches used in medicine?
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they secrete an anticoagulant that prevents congestion of blood vessels
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What type of 'skeleton' do annelids have?
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hydrostatic
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Name four characteristics of animals:
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multicellular; eukaryotic cells, heterotrophic, mobile at some stages (my be sessile at a stage)
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What are the two main groups of animals?
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invertebrates and vertebrates
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What does vertebrate mean?
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an animal has a spine, endoskeleton
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What is an invertebrate?
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animal with an exoskeleton or hydrostatic skeleton, and no spine
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What are the two main types of animal body symmetry?
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radial and bilateral
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An animal with radial symmetry has a dorsal and ventral end but no...
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anterior or posterior end
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An animal with bilateral symmetry has what kinds of ends?
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dorsal, ventral, posterior and anterior
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What is a blastula?
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a stage in embryo development that is a ball of hollow cells
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What is a gastrula
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a two-layered, cup-shaped embryo
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What is a fully lined body cavity called
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a coelom
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What are organisms with a coelom called?
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coelomates
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What are organisms without coeloms called?
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acoelomates
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What are orgnanisms with partially lined coeloms called?
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pseudocoelomates
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