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The appendages of arthropods are. found only on the head. hard and immovable. jointed and extend from the body wall. divided into six branches. What substance found in the skeleton of a desert-dwelling beetle is likely to be absent from the skeleton of an aquatic beetle?. chitin wax silk

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the appendages of arthropods are
The appendages of arthropods are
  • found only on the head.
  • hard and immovable.
  • jointed and extend from the body wall.
  • divided into six branches.
slide2
What substance found in the skeleton of a desert-dwelling beetle is likely to be absent from the skeleton of an aquatic beetle?
  • chitin
  • wax
  • silk
  • protein
figure 28 1 shows the respiratory system of a grasshopper the structures labeled x are called
Figure 28–1 shows the respiratory system of a grasshopper. The structures labeled X are called
  • tracheal tubes.
  • Malpighian tubules.
  • book lungs.
  • book gills.
which of the following habitats do arthropods occupy
Which of the following habitats do arthropods occupy?
  • the sea
  • the land
  • the air
  • all of the above
typical primitive arthropods had bodies that were composed of
Typical primitive arthropods had bodies that were composed of
  • many segments.
  • three segments.
  • one segment.
  • no segments.
the evolution of arthropods has led to
The evolution of arthropods has led to
  • more body segments and more specialized appendages.
  • fewer body segments and more specialized appendages.
  • more body segments and fewer specialized appendages.
  • fewer body segments and fewer specialized appendages.
what does molting enable arthropods to do
What does molting enable arthropods to do?
  • to breathe
  • to reproduce
  • to grow
  • to eat
which of these events is the first to happen when an arthropod molts
Which of these events is the first to happen when an arthropod molts?
  • The animal fills with air or fluids.
  • A new skeleton is secreted.
  • The animal pulls itself out of the original skeleton.
  • Skin glands digest the inner part of the skeleton.
an arthropod is vulnerable to predators during the molting period because
An arthropod is vulnerable to predators during the molting period because
  • it must come out of hiding to molt.
  • its new exoskeleton is soft.
  • molting cannot occur without the assistance of predators.
  • predators are more numerous during this period.
which of the following invertebrates is not a crustacean
Which of the following invertebrates is NOT a crustacean?
  • horseshoe crab
  • fiddler crab
  • barnacle
  • crayfish
arthropods are classified based on the number and structure of their
Arthropods are classified based on the number and structure of their
  • eyes and wings.
  • body segments and appendages.
  • muscles and bones.
  • gills and hearts.
which appendages are especially important in the classification of arthropods
Which appendages are especially important in the classification of arthropods?
  • mouthparts
  • legs
  • antennae
  • swimmerets
an example of a chelicerate is a
An example of a chelicerate is a
  • lobster.
  • centipede.
  • crayfish.
  • spider.
insects are classified as
Insects are classified as
  • crustaceans.
  • arachnids.
  • uniramians.
  • chelicerates.
the easiest way to tell whether an arthropod is an insect or a spider is to
The easiest way to tell whether an arthropod is an insect or a spider is to
  • observe its color.
  • count its legs.
  • count its swimmerets.
  • measure the length of its body.
one similarity between a spider and a crayfish is that both animals have
One similarity between a spider and a crayfish is that both animals have
  • chelicerae and pedipalps.
  • two pairs of antennae.
  • chelipeds and mandibles.
  • a cephalothorax and an abdomen.
the respiratory organ in terrestrial chelicerates is the
The respiratory organ in terrestrial chelicerates is the
  • chelicera.
  • book lung.
  • book gill.
  • pedipalp.
spiders feed by
Spiders feed by
  • swallowing their prey whole.
  • biting off and swallowing pieces of their prey.
  • sucking up prey tissues that have been liquefied by enzymes.
  • sipping nectar through a tubelike mouthpart.
slide21

If a butterfly touches sugar water with one of its legs, it usually will begin to feed. If it touches salt water, it usually will not feed. The most likely explanation for this difference in response is that butterflies

  • cannot tell the difference between sugar water and salt water.
  • can distinguish sugar water from salt water by sight.
  • use the ears behind their legs to distinguish sugar water from salt water.
  • have chemical receptors for taste on their legs.
which of the following is not a reason for the evolutionary success of insects
Which of the following is NOT a reason for the evolutionary success of insects?
  • The ability to fly has allowed insects to colonize new habitats.
  • Insects as a group are not very diverse because there are relatively few species.
  • Insects use many sense organs to respond to stimuli.
  • Many insects have a life cycle in which the young are very different from adults.
the compound eyes of insects
The compound eyes of insects
  • are made of many lenses.
  • are located on the thorax.
  • produce an image that is more detailed than what humans see.
  • are not very good at detecting movement.
the body of an insect is divided into a
The body of an insect is divided into a
  • head and a thorax.
  • head and a cephalothorax.
  • head, a thorax, and an abdomen.
  • cephalothorax and an abdomen.
an insect can detect minute movements in its environment by using its compound eyes and its
An insect can detect minute movements in its environment by using its compound eyes and its
  • Malpighian tubules.
  • tracheal tubes.
  • chelicerae.
  • sensory hairs.
an example of an insect that undergoes incomplete metamorphosis is the
An example of an insect that undergoes incomplete metamorphosis is the
  • moth.
  • bee.
  • ladybug.
  • chinch bug.
one difference between a nymph and a larva is that a nymph
One difference between a nymph and a larva is that a nymph
  • can fly, but a larva cannot.
  • is specialized for reproduction, but a larva is not.
  • resembles an adult of the same species, but a larva does not.
  • molts to become a pupa, but a larva molts to become an adult.
in most ant societies egg laying is performed by
In most ant societies, egg-laying is performed by
  • the workers.
  • one queen.
  • hundreds of queens.
  • reproductive males.
honeybees use dances to
Honeybees use dances to
  • lure insects of other species.
  • signal the death of a member of the colony.
  • attract mates.
  • convey information about food sources.
when a honeybee performs the waggle dance the direction of the food is indicated by the
When a honeybee performs the waggle dance, the direction of the food is indicated by the
  • direction of the straight run.
  • number of straight runs in the dance.
  • number of circles in the dance.
  • frequency with which the bee changes direction.
to determine whether an animal is a cnidarian or an echinoderm you should
To determine whether an animal is a cnidarian or an echinoderm, you should
  • determine its habitat.
  • find out if it has a backbone.
  • study its embryonic development.
  • discover whether it is aquatic or terrestrial.
echinoderms are like vertebrates in that echinoderms
Echinoderms are like vertebrates in that echinoderms
  • are bilaterally symmetrical as larvae and as adults.
  • are deuterostomes.
  • have cephalization.
  • have an anterior end and a posterior end.
in most species of echinoderms respiration occurs mainly in the
In most species of echinoderms, respiration occurs mainly in the
  • tube feet.
  • madreporite.
  • ring canal.
  • radial canals.
the skeleton of an echinoderm is an
The skeleton of an echinoderm is an
  • exoskeleton made of calcium carbonate.
  • exoskeleton made of chitin.
  • endoskeleton made of calcium carbonate.
  • endoskeleton made of chitin.
in an echinoderm the structure that operates like a living suction cup is the
In an echinoderm, the structure that operates like a living suction cup is the
  • madreporite.
  • tube foot.
  • stomach.
  • nerve ring.
slide38
The water vascular system of echinoderms is involved with each of the following body functions EXCEPT
  • respiration.
  • circulation.
  • movement.
  • reproduction.
which of the following statements about the water vascular system of echinoderms is correct
Which of the following statements about the water vascular system of echinoderms is correct?
  • The ring canal connects to the madreporite.
  • The madreporite forms a circle around the animal’s mouth.
  • The tube feet are attached to the ring canal.
  • Each radial canal opens to the outside.
the echinoderms that look like warty moving pickles are
The echinoderms that look like warty, moving pickles are
  • sea urchins.
  • sea cucumbers.
  • sea stars.
  • feather stars.
sea lilies and feather stars
Sea lilies and feather stars
  • make up the oldest class of echinoderms.
  • feed by scraping algae from rocks.
  • are the only echinoderms that live in fresh water.
  • are disk-shaped echinoderms that often burrow into the sand.
the plates of the endoskeleton are reduced and contained inside a soft muscular body wall in
The plates of the endoskeleton are reduced and contained inside a soft, muscular body wall in
  • sand dollars.
  • sea cucumbers.
  • sea urchins.
  • brittle stars.
two echinoderms that are in the same class are
Two echinoderms that are in the same class are
  • brittle stars and sea stars.
  • sea stars and sea cucumbers.
  • sea cucumbers and sea urchins.
  • sea urchins and sand dollars.
slide45
In the Great Barrier Reef of Australia, extensive areas of coral have been destroyed by the crown of thorns, which is a type of
  • sea cucumber.
  • sea urchin.
  • sea star.
  • sea lily.
one of the common features of arthropods is a tough endoskeleton
One of the common features of arthropods is a tough endoskeleton. _________________________
  • True
  • False
living arthropods generally have fewer body segments than ancestral arthropods
Living arthropods generally have fewer body segments than ancestral arthropods. _________________________
  • True
  • False
slide48
The process in which an arthropod sheds its skeleton and manufactures a larger one is called flexing. _________________________
  • True
  • False
the three major groups of arthropods are crustaceans chelicerates and uniramians
The three major groups of arthropods are crustaceans, chelicerates, and uniramians. _________________________
  • True
  • False
in a crayfish the carapace is the part of the skeleton that covers the abdomen
In a crayfish, the carapace is the part of the skeleton that covers the abdomen. _________________________
  • True
  • False
slide51

If an arthropod has antennae and its body is divided into a cephalothorax and an abdomen, the arthropod is classified in the group called chelicerates. _________________________

  • True
  • False
in a crayfish the chelipeds have large claws
In a crayfish, the chelipeds have large claws. _________________________.
  • True
  • False
the mouthparts of insects consist of three pairs of appendages including a pair of chelicerae
The mouthparts of insects consist of three pairs of appendages, including a pair of chelicerae. _________________________
  • True
  • False
slide54
If an insect exists as a nymph before becoming an adult, the insect goes through complete metamorphosis. _________________________
  • True
  • False
slide55

When a honeybee performs the round dance, it indicates that a food source has a low energy value by changing direction less frequently than it would if the food were high quality. _________________________

  • True
  • False
an adult starfish has radial symmetry
An adult starfish has radial symmetry. _________________________
  • True
  • False
echinoderms are animals in which the blastopore develops into an anus
Echinoderms are animals in which the blastopore develops into an anus. _________________________
  • True
  • False
an echinoderm s water vascular system opens to the outside through the ring canal
An echinoderm’s water vascular system opens to the outside through the ring canal. _________________________
  • True
  • False
slide59
When an echinoderm exerts a pulling force on an object, muscles pull the centers of the tube feet upward. _________________________
  • True
  • False
each segment in the body of a trilobite had two attached to it

0 of 5

Each segment in the body of a trilobite had two ____________________ attached to it.
a typical primitive arthropod had many identical each with a pair of appendages

0 of 5

A typical primitive arthropod had many identical ____________________, each with a pair of appendages.
arthropods are classified on the basis of the number and structure of their body segments and

0 of 5

Arthropods are classified on the basis of the number and structure of their body segments and ____________________.
on the chelicerate in figure 28 2 the appendages labeled 2 which contain fangs are called

0 of 5

On the chelicerate in Figure 28–2, the appendages labeled 2, which contain fangs, are called ____________________.
slide72

0 of 5

An immature grasshopper resembles an adult grasshopper but does not have wings. Therefore, grasshoppers undergo ____________________ metamorphosis.

within a society particular tasks or roles are performed by groups of individuals called

0 of 5

Within a society, particular tasks or roles are performed by groups of individuals called ____________________.
echinoderms excrete nitrogen containing cellular wastes primarily in the form of

0 of 5

Echinoderms excrete nitrogen-containing cellular wastes primarily in the form of ____________________.
in the water vascular system of a sea star the connect the ring canal with the tube feet

0 of 5

In the water vascular system of a sea star, the _________________________ connect the ring canal with the tube feet.
slide77

0 of 5

Echinoderm X has slender, flexible arms, can move rapidly, and feeds on detritus. This echinoderm is a(an) _________________________.
slide79

0 of 5

How would the body plan of a typical primitive arthropod probably differ from that of a living arthropod such as a crayfish?
slide80

0 of 5

Suppose an arthropod lacked the skin glands that normally are responsible for digesting the inner part of the skeleton. How would this defect affect the arthropod’s ability to grow?

slide81

0 of 5

Suppose you observed an arthropod whose body was divided into a cephalothorax and an abdomen. To which of the three major groups of arthropods could this specimen belong?

slide88

0 of 5

If you found a caterpillar of a species you had never seen before, why would it be difficult to predict what the adult of that species looks like?

slide94

0 of 5

A friend tells you that he has found a small animal with a segmented body and jointed appendages. On the basis of these two features, he concludes that the animal is an arthropod. Evaluate his conclusion.

slide99

0 of 5

One reason that is cited for the evolutionary success of insects is that many young insects differ from adults in appearance and feeding methods. However, this reason generally applies only to insects undergoing one of the two types of insect metamorphosis. What is that type of metamorphosis? Why doesn’t the other type of metamorphosis have this advantage?

slide100

0 of 5

Explain how a worker honeybee communicates the location of food that is more than 50 meters from the hive.
slide102

0 of 5

Explain how echinoderms can survive without a specialized circulatory, respiratory, or excretory system.