Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Lab 9: Invertebrates
| Question | Answer |
|---|---|
| The anatomy and behavior of a sponge aid and its survival and its ability to reproduce. How does a sponge Protect itself from predators? Acquire and digest food? | Spicules, toxins, & camouflage Filter feeding, amoebocytes, continuous flow |
| Which specialized cells give cnidarians their name, and what is their function? | Cnidocytes are stinging cells that protect the organism and help capture prey |
| How does a hydra acquire and digest food? | Tentacles with cnidocytes along with the mouth and gastrovascular cavity |
| How does a hydra protect itself from predators? | Stinging cells along with flexibility and small size |
| How do humans get infected with the pig tapeworm? | Eating undercooked or raw pork |
| What is the function of a tapeworm's hook and suckers? | Secure to the hosts intestine |
| Why would you expect a tapeworm to have a reduced digestive system? | Doesn’t digest its own food |
| Proglottids mature into “bags of eggs’. Given the life cycle of the tapeworm, why might a tapeworm have an expanded reproductive system compared to a planarian? | Must produce massive number of eggs |
| How are roundworms more advanced than flatworms? | Complete digestive tract with mouth and anus |
| Which diseases are caused by roundworms? | Trichinosis, elephantiasis, and hookworm |
| The digestive tract has both a mouth and an anus. What is the advantage of this? | Allows one-way flow of food |
| A body cavity which allows space for the organs, is incompletely lined with mesoderm. How would the presence of these two features lead to complexity? | Provides space for organs and a hydrostatic skeleton |
| Describe behavior of rotifer’s behavior. | Moves towards vegetation |
| What structural feature is present in vertebrates but lacking in the invertebrates? | Backbone |
| What is an incompletely lined body cavity called? | Pseudocolem |
| What type of symmetry is associated with one plane of symmetry and definite right and left halves? | Bilateral symmetry |
| What is the name of the main opening in a sponge through which water is expelled? | Osculum |
| What are the hard and sharp projections of a calcareous sponge called? | Spicules |
| What is the name given to the body form of a cnidarian that has a mouth directed upward? | Polyp |
| What kind of symmetry do organisms classified as cnidarian have? | Radical symmetry |
| What is the fluid-filled capsule in a cnidocyte called? | Nematocyst |
| What structure in a planarian digests food and ensures that nutrients get to all the cells? | Branched gastrovascular cavity |
| What is the name given to the ciliated cells that perform excretion for a planarian? | Flame cells |
| What structures enable a tapeworm to attach itself to the intestinal wall of its host? | Hooks and suckers |
| What are the anterior and posterior ends of a complete digestive tract called? | Mouth and anus |
| Which of the phyla covered in this lab exercise have complete digestive tracts? | Roundworms |
| Which phylum of animals uses a crown of cilia to draw water and food into the mouth? | Rotifera |
| Earthworm Habitat | Moist soil or underground burrows |
| Earthworm feeding mode | Detritivore |
| Earthworm skeleton | Hydrostatic skeleton |
| Earthworm Segmentation | Segmented body |
| Earthworm Circulation | Closed circulating system |
| earthworm respiratory organs | Gas exchange through moist skin |
| earthworm locomotion | Use setae and muscle to crawl |
| earthworm reproductive organs | Hermaphrodite |
| Crayfish locomotion | Jointed legs |
| Crayfish respiration | gills |
| Crayfish sense organs | Antennae, Statocysts, and compound eyes |
| Crayfish nervous system | Ventral nerve cord with ganglia |
| crayfish external reproductive features: male | First pair of owimmerets enlarged |
| crayfish external reproductive features: female | All swimmerets similar |
| grasshopper locomotion | 3 pairs of jointed legs |
| grasshopper respiration | Tracheal tubes with spiracles |
| grasshopper sense organs | Antennae, compound eyes, and tympanum |
| Grasshopper nervous system | Ventral nerve cord with ganglia |
| grasshopper external reproductive features: male | Smaller abdomen |
| grasshopper external reproductive features: female | Has ovipositor at tip of the abdomen |
| In insects with incomplete metamorphosis, do the nymphs or the adult have better developed wings? What is the benefit of wings to an insect? | Adult. Allow the insects to move to new areas, escape predators, find food, and locate mates |
| What stage is missing when an insect has incomplete metamorphosis? What happens during this stage? | Pupa The insects undergoes major transformation |
| What form, the larvae or the adult, disperses new individuals in flying insects that exhibit complete metamorphosis? How is this a benefit? | Adult Adults can fly to new locations |
| In insects that undergo complete metamorphosis, the larvae and the adults utilize different food sources and habitat. Why might this be a benefit? | It reduces competition for food and space between larvae and adults |
| What tissue layer lines the body cavity of an animal that contains a coelom? | Mesoderm |
| Is an animal a protostome or a deuterostome if the first opening becomes the mouth? | Protostome |
| What characteristics does an animal with a definite head region have? | Cephalization |
| What organ is found inside the pericardial sac (pericardium)? | Heart |
| What kind of skeleton do annelids have? | Hydrostatic skeleton |
| To what system do the crops and gizzard of an earthworm belong? | Digestive |
| What is the location of the nerve cord in an earthworm? | Ventral |
| What phylum of animals have chitinous exoskeletons? | Arthropoda |
| What are the excretory structures in a crayfish called? | Green glands |
| How is air taken directly to the muscles in a grasshopper? | Through tracheal tubes |
| What system of the echinoderms enables them to move about? | Water vascular systems |
| What kind of symmetry does an adult starfish have? | Radical symmetry |
| Where does water enter the water vascular system in a starfish? | Through madreporite |
| Describe several of the specialized digestive organs in the animals studied in this laboratory given that they all have coelom and a complete digestive system with a separate mouth and anus. | The gizzard is a muscular organ that grinds food. The intestine helps with chemical digestion and nutrients absorption. The pharynx is a muscular tube that pulls food into the mouth |
| Explain why an earthworm will die if it dries out based on the type of skeleton annelids have and the absence of a respiratory organ or system in the earthworm. | Earthworms have a hydrostatic skeleton and don’t have a respiratory system. They breathe through their skin which must stay moist for oxygen to get to the blood stream. When their skin dries out they suffocate because gas exchange cannot occur. |
| Contrast an arthropod, the crayfish or the grasshopper, with representative echinoderm, the starfish, with regard to signs of cephalization and how the type of symmetry each has is related. | Arthropods show cephalization. They have an obvious head region with attentiveness of sensory organs and brain. Echinoderms don’t show cephalization. Arthropods have bilateral symmetry . Echinoderms have radical symmetry |
Created by:
rimajackson2
Popular Biology sets