Invertebrates - Unit 4
Tell me 2 examples of worms:
Planarians, tapeworms, flukes, earthworms, leeches, marine tubeworms, etc
Tell me 2 examples of gastropods
Land snails, sea snails, limpets, slugs, nudibranchs (sea slugs) and sea hares
Give me 3 examples of crustaceans:
Tell me 3 examples of cartilaginous fish:
sharks (great white, hammer head, etc), sting rays, manta rays,
Animals are classified into two groups: __________ and ________, depending on whether they have a backbone and an internal skeleton made up of bones.
Vertebrates and Invertebrates
The majority of animals move from one place to anothe, although some aquatic animals are sessile. What does sessile mean?
This means that they live fixed to the seabed and do not move.
Tell me 2 exclusive features of poriferans
They have no tissues and no organs. The body is sack-like and presents pores and channels through which filter food and oxygen.
Tell me 3 examples of Echinoderms:
sea urchins, star fish, sea potatoes, sea lilies, sea cucumbers, etc
Tell me 3 examples of bony fish:
eels, swordfish, angler fish, seahorses, anchovies, gold fish, etc
_________ constitute the most numerous and diverse animal kingdom animal (1.2 million species) and also the most successful: they have conquered all media, including air.
Arthropods
What is an ectotherm? (in reference to body temperature)
They do not have mechanisms to control body temperature, which depends on the environment.
Give me 5 examples of CNIDARIANS
Jellyfish, sea wasps, corals, gorgonians, hydras, sea feathers, sea tomatoes, and anemones.
Tell me two examples of Myriapods:
centipedes, millipedes, scolopendras
Tell me two examples of Chelonians
Sea turtles and tortoises
These two animals are from the same order (Crocodilia) but they are from different families. They are _______ and ________.
alligators and crocodiles
Give me 2 exclusive features of Cnidarians
They have tentacles with stinging cells (cnidoblasts) which are used to kill their prey.
Sackshaped body with a single opening, with two shapes: polyp or medusa.
1. What does cephalopod mean?
2. Give me 3 examples of cephalopods?
1. head in the foot
2. octopus, squid, cuttlefish, and nautilus
Arthropodes vs Humans
What are some cons of arthropodes? (tell me two exmaples)
Many are harmful to crops and cause millions in losses (aphids, lobsters, caterpillars, larvae, etc).
Insecticides have detrimental effects on health
Many are external parasites of animals, or sting (lice, ticks, processionary, scolopendras, wasps ...)
They are vectors of viral and bacterial diseases of both plants and animals: fleas, mosquitoes, ticks, etc.
Some destroy materials: paper, wood, clothing (eg: termites, moths, etc)
How many species of amphibians are there?
1. less than 500
2. more than 6,300
3. between 1,000 and 1,100
4. between 2,000 and 2,100
5. 10,000
6. 20,000
7. 30,000
8. 6,000
9. 2,500
10. 5,000
2. more than 6,300
Iguanas, chameleons, geckos, night lizards, blind lizards, skinks, anguids, beaded lizards and many others are part of the order: _________.
The Squamata order
What is the importance (good and bad) of mollusks? (three examples)
Great food and economic importance
Used in jewelry (pearls, mother-of-pearl ...)
Ornamentation and collecting
Great importance in the marine ecosystem
Snails and slugs are pests for agriculture
Thanks to the shell, they constitute important fossils that allow to know the fauna of the past
They transmit parasites and filter feeders can accumulate polluting substances in the chain food
Tell me 3 economic and environmental importances of porifera and cnidarians
Certain sponges are commercially sold as natural bath sponges
Some porifera serve as a refuge for marine animals
Sea wasps are the most poisonous animals on the planet
Pests of jellyfish affect tourism and harm bathers
Corals are important in ornamentation and jewelry and are currently protected
Coral reefs are important places of biodiversity that are threatened
Sea nettles are edible.
Arthropods vs Humans:
What are the pros of Arthropods? (three examples)
Human food (and the maintenance of terrestrial ecosystems in general) depends on the life of pollinating insects, especially bees (73% of crops are pollinated by bees). They have evolved together with the cormophytes.
Used in biological warfare against pests (such as ladybugs against aphids)
Culinary and nutritional value (crustaceans, larvae, scorpions, ants, grasshoppers ...)
Obtaining products: honey, beeswax, royal jelly, silk thread
They have been used in medicine (such as bee stings against arthritis)
They are used in scientific research (vinegar fly)
Essential in the ecosystem, whether they are prey or predator.
What are the definitions of placentals, monotremes, and marsupials?
1. oviparous without breasts but with milk
2. viviparous without complete placenta
3. viviparous with complete placenta
Placentals: (3) viviparous with complete placenta
Monotremes: (1) oviparous without breasts but with milk
Marsupials: (2) viviparous without complete placenta
ECOLOGICAL AND ECONOMIC IMPORTANCE OF THE ECHINODERMS:
1. Some holothurians and ____ ______ are edible.
2. Its power of regeneration is investigated to be used in ________.
2. medicine