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Life Science
Ch. 14 Questions and key chapter points.
| Question | Answer |
|---|---|
| Almost all organisms in Animalia share the following characteristics: | - eukaryotic cells - no cell walls - multicellular - extra-cellular matrix - cells organized into tissue - sexually reproduce - mobile - heterotrophic - store excess energy as glycogen - aerobic |
| What has a spinal column and what does not? | Vertebrates have a spinal column and invertebrates do not. |
| Animals display three types of symmetry: | Radial, bilateral, or no symmetry. |
| Sponges are in the phylum _____________. Their defining feature is a _____________. | Sponges are in the phylum Porifera. Their defining feature is a porous body. |
| Jellyfish, anemones, and coral are in the phylum _____________. Their defining feature is a special cell (a _____________), which contains a special organelle (the _____________). | Jellyfish, anemones, and coral are int the phylum Cnidaria. Their defining feature is a special cell (a cnidocyte), which contains a special organelle (the nematocyst). |
| Flatworms are in the phylum _____________. Their defining feature is a _____________ with _____________. | Flatworms are in the phylum Platyhelminthes. Their defining feature is a flat body with no appendages. |
| Earthworms are in the phylum _____________. Their defining features are the many visible _____________ and _____________. | Earthworms are in the phylum Annelida. Their defining features are the many visible body segments and lack of appendages. |
| Crabs, octopi, squids, clams, and snails are in the phylum _____________. Their defining feature is a _____________. | Crabs, octopi, squids, clams, and snails are in the phylum Mollusca. Their defining feature is a soft body. |
| Spiders, centipedes, millipedes, insects, lobsters, crabs, and shrimp are in the phylum _____________. Their defining features are an _____________ and _____________. | Spiders, centipedes, millipedes, insects, lobsters, crabs, and shrimp are in the phylum Arthropoda. Their defining features are an exoskeleton made of chitin and jointed appendages. |
| Starfish, sand dollars, and sea urchins are in the phylum _____________. Their defining feature is an _____________. | Starfish, sand dollars, and sea urchins are in the phylum Echinodermata. Their defining feature is an endoskeleton made of ossicles. |
| What are organisms that do not have a spinal column called? | Organisms without a spinal column are called invertebrates |
| What are organisms that do have a spinal column called? | Organisms that have a spinal columns are called vertebrates. |
| True or False? All animals have an extracellular matrix, are multicellular, and have cell walls. | False. All animals do have a extra-cellular matrix and are multicellular, but no animals have cell walls. |
| Is an organism that stores its excess energy as glycogen possibly an animal? Why or why not? | Yes, the organism is possibly an animal because all animals store excess energy as glycogen. |
| What is the defining feature of Porifera? | The defining feature of Porifera (sponges) is that their bodies are filled with pores (holes). |
| What is a nematocyst, and what organisms have them? | A nematocyst is a specialized organelle found within a stinging cell, called a cnidocyte Nematocysts are found only in organisms classified into the phylum Cnidaria. |
| True or False? Animals that are polyps are usually mobile. | False. Animals that are polyps are usually sessile. |
| What is a planarian? | A planarian is a type of free-living flatworm in the class Turbellaria, in the phylum Platyhelminthes. |
| Name the feature of the tapeworms that make them effective intestinal parasites. | Their specialized head, called the scolex makes tapeworms effective intestinal parasites. |
| What is the defining feature of an annelid? | The defining feature of an annelid is the multiple, easily visible body segments. |
| True or False? Like humans, earthworms have a closed circulatory system. | True. |
| True or False? A trilobite is an extinct species of arthropoda. | True. |
| What are two of the main features of arthropods? | The rigid exoskeleton made of chitin and the jointed appendages. |
| What are Malpighian tubules? | Malpighian tubules are special arthropod structures that remove wastes from their bodies. |
| Describe the process of complete metamorphosis of a butterfly starting with the larval stage. | During the larval stage, the larva (called a caterpillar) undergoes several moltings (or shedding of the exoskeleton as the larva grows). At the last molting, it takes on the form of a pupa. |
| Describe the process of complete metamorphosis of a butterfly starting with the larval stage. Part 2. | The pupa then makes a chrysalis, which encloses and protects the the pupa. The final metamorphosis occurs within the chrysalis in which the pupa is transformed into a butterfly. |
| True or False? A nymph is an immature form of a butterfly. | False. A nymph is an immature form of an arthropod which undergoes incomplete metamorphosis. Since butterflies. undergo complete metamorphosis, nymph would be the improper word for an immature butterfly. |
| What are ossicles of echinoderms? | Ossicles are the plates that make up an echinoderm's endoskeleton. |