Mollusks, Arthropods And Echinoderms Flashcards
Which two are characteristics of a mollusk?
A)vertebrate,
B) invertebrate
C) segmented body
D) unsegmented body
Invertebrate
Unsegmented body
What is the function of the hard outer shell of a mollusk?
Protects the mollusk’s soft body
What is the function on the mantle ?
Covers internal organs
What is the function of a mollusk’s foot?
Crawling, digging or catching prey
True or false? Mollusks are found only in dry places on land?
False
What type of symmetry do mollusks have?
Bilateral
What is the function of a gill
The remove oxygen from the water
What are cilia and what is the function of them?
They are tiny hairlike structures that move water over the gills
What are radula?
A flexible ribbon of tiny teeth that scrape food from a surface
What are four characteristics that biologist use to classify mollusks?
1- presence of a shell
2 type of shell
3 type of foot
4 complexity of the nervous system
What are the three major types of mollusks?
1- gastropods
2- bivalves
3- cephlapods
Mollusks that have a single shell are called?
Gastropods
What are bivalves?
Mollusks that have two shells held together by hinges and strong muscles
How are bivalves different from other mollusks?
Bivalves don’t have radulas . Instead most are filter feeders that strain tiny organisms from the water.
Which two are true about bivalves?
A) bivalves use gills to capture food
B) bivalves live on land
C) clams burrow in mud
D) a pearl forms in an oyster to protect the oyster from predators
They use their gills to capture food, clams burrow in mud
Mollusks whose feet are adapted to form tentacles around their mouths are ?
Cephalopods
What type cephalopod has a shell outside the body?
Nautilus, squid or octopus?
Nautilus
What type of cephalopod has no shell?
Octopus
What type of cephalopod has has a small shell inside their body?
Squid
How do cephalopods catch their food?
The capture prey by using muscular tentacles. The find this food they use their suckers.
Which 2 are true about cephalopods?
A) they have large eyes and a complex nervous system
B) they cannot remember things
C ) all live in the ocean
D) they swim by waving tentacles
They have large eyes, a complex nervous system and they all live in the ocean
Give a common example of each type of mollusk.
1) gastropod- slug
2) bivalve- clam
3) cephalopod- octopus
A row of teeth found in gastropods and cephalopods are called
Radula
The group of mollusks with the most complex nervous system of any invertebrate is the
Cephalopod group
What eats both plants and animals?
Omnivore
What is a two shelled mollusk?
Bivalve
A snail is an example of a
Gastropod
Most water dwelling mollusks have what part that removes oxygen from the water?
Gills
What are the major groups of arthropods ?
Crustaceans, arachnids, centipedes and millipedes and insects
Are arthropods invertebrates?
Yes
What are the characteristics of arthropods?
1- invertebrates
2- external skeletons
3) segmented bodies
4) jointed attachments ( appendages)
What are some examples of appendages?
Wings, legs
How does an exoskeleton help arthropods live on land?
It prevents the arthropod from drying out on land
When an arthropod grows what happens to the exoskeleton?
Molting : sheds and grows a new one
How many pairs of antennae do crustaceans have?
2
How many body sections do arachnids have?
2
How many pairs of legs do insects have?
3
True or false?
Joints in their appendages give arthropods flexibility and the ability to move
True
What is the function of the antennae?
They have sense organs for smelling, tasting and touching
What is the function of legs
Walking, catching prey, defending against predators
What is a crustacean?
An arthropod that has two or three body sections, five or more pairs of legs and two pairs of antennae
What is true about crustaceans?
A) get oxygen through gills
B) live only in dry areas
C) pistol shrimp eat dead plants and animals
D) krill are herbivores
They get oxygen through gills and krill are herbivores
Crustacean larvae develop into adults by?
Metamorphosis
An arthropod with only 2 body section and four pairs of legs are
Arachnids
What are characteristics of arachnids?
A) abdomen has reproductive organs
B) four pairs of legs
C ) four antennae
D) parasitic
Abdomen contains reproductive organs and four pairs of legs
Are all spiders herbivores?
NO
Do all spiders build webs to catch their prey?
NO
Do spiders have hollow fangs that inject venom into prey?
YES
Do spiders rarely bite people?
Yes
Which one is a mite?
Black widow, chigger, brown recluse or a tarantula?
Chigger
When are scorpions most active?
At night
What does a scorpion have at the end of its abdomen to inject venom into prey?
Stinger
What are ticks?
Parasites that live on the outside of a host animals body
Which has two pairs of legs on each segment? A centipede or a millipede ?
Millipede
What has one pair of legs on each segment? Centipede or millipede!?
Centipede
Which is a predator that injects venom? Centipede or millipede
Centipede
Which is a scavenger? Centipede or millipede?
Millipede
An arthropods what protects it and keeps it from drying out?
Exoskeleton
The heads of some arthropods have what which contain sense organs?
Antennae
Some animals go through this process during their life cycle in which their bodies undergo dramatic changes in form as they develop . This is called
Metamorphosis
The hind body section of an arachnid is called its
Abdomen
The process of shedding the outgrown exoskeleton is called
Molting
What are the steps of metamorphosis in an insect?
Egg- larvae- pupa- adult insect
What is an insect?
Arthropods, three body sections, six legs, one pair on antennae, and usually one or two pair of wings
What body section are the wings and legs attached?
Thorax
What do insects have two of that contain many lenses?
Compound eyes
How do insects get oxygen in their bodies ?
Through a system of tubes
Do some insects feed on the blood of living animals ?
Yes, true
How do insects get food? What do they use ?
By using mouthparts that are highly specialized
In gradual metamorphosis the egg hatches into a (——-) which looks like a small adult
Nymph
What is a food chain?
A series of events in which organisms eat each other and get energy
What is the study of food chains and other ways organisms interact with their environments?
Ecology
What does a food chain start with?
A producer
What is a producer?
An organism that makes their own food ( plant)
What are consumers?
Organisms that obtain energy by eating other organisms ( some eat producers( plants) others eat other consumers)
What is a decomposer?
Breaks down wares and dead bodies of other organisms
Is the following true or false? About 50 % of crops grown for human consumption are eaten by insects
False
True or false: insects play key roles in food chains
True
An organism that eats wastes and dead organisms is called a
Decomposer
What does a pollinator do?
A pollinator carries pollen from one plant to another of the same species so that they can reproduce
What are two types of insects that can spread disease?
Mosquitoes and fleas
True or false? Pesticides used to kill harmful insects can also kill pollinators and can harm other animals
TRUE
A method of Introducing natural insect predators or natural insect diseases to get rid of harmful insects is called
Biological control
Insects play a key role in?
Food chains
All insects are:
Consumers
Insects used for biological control include
Ladybugs
People sometimes use chemical called what to try to kill harmful insects
Pesticides
What is animal called that carries pollen from one plant to another
Pollinator
What is an echinoderm?
Invertebrate, internal skeleton, system of fluid filled tubes called a water vascular system
What are tube feet?
They are potions of the tubes that squeeze together forcing water into the structure
What is a water vascular system?
The internal system of fluid filled tubes in echinoderms
Can you label the main parts of a sea stars vascular system in a diagram?
Know tube feet, where the opening for water is and where the water vascular system is
Is the following true or false? A sea star forces its stomach into the opening of a clams shell to digest the clams body
True
How do brittle stars get food?
Tube feet
How do brittle stars move?
Slither in a snakelike motion
How do sea urchins get food?
Scrape food with with five teeth like structures they project from their mouth
How do sea urchins move?
Bands of tube feet that extent out between their spines
How do sea cucumbers get their food?
Lengthen their tentacles to sweet food toward its mouth
How do sea cucumbers move?
Rows of tube feet on their underside
Which of the following is NOT an echinoderm?
Fiddler crab, brittle star, sea urchin or sea cucumber
Fiddler crab
Do tube feet digest food?
NO the help echinoderms move along the ocean floor, catch food and grip surfaces
How does a sea star captures its food?
Uses five arms to grasp a clam, then it pulls on the tightly closed shell with its tube feet, when the shell opens, the sea star forces its stomach out of its mouth and into the opening between the clams shell . Digestive chemicals then break down the clams tissues and the sea star sucks in
What consists of fluid filled tubes within the echinoderms body?
The water vascular system
What does an echinoderms have that supports its body?
Endoskeleton
Animals that live in what phylum are radially symmetrical invertebrates that live on the ocean floor?
Echinoderm
