Here is the lesson that i am curently on: Please HELP! Answer the questions 3 an
ID: 3166454 • Letter: H
Question
Here is the lesson that i am curently on: Please HELP! Answer the questions 3 and 4
In the late 1960s, Robert Whittaker suggested there were five kingdoms: Animalia, Plantae, Fungi, Protista, and Monera. Some modern classifications use six kingdoms, and sometimes more--so don't let the number of kingdoms confuse you, it's still based on the same system. Many biologists still utilize only the five kingdoms.
Animalia -- all multicellular, heterotrophs (feed off other organisms)
Plantae -- all multicellular, photosynthetic (convert sunlight to energy), autotrophs (self-feeders)
Fungi -- some single but mostly multicellular, eukaryotic
Protista -- single celled eukaryotic (complex cell) organisms, may live in colonies
Monera -- single celled, prokaryotic (simple cell) organisms, may live in colonies
2. Taxa
(2.1) The system Linnaeus created was based on a hierarchy. The kingdom is the largest unit in the breakdown, and each unit is then broken down into smaller units. These units, or categories, are called taxa (singular: taxon). The final two taxa, genus and species, are what give an organism its two names for binomial nomenclature.
Kingdom
Phylum
Class
Order
Family
Genus
Species
(2.2) Linnaeus organized animals into his hierarchy based primarily on morphology--what shared characteristics the animals had. In modern times, we have purified his system through the use of DNA to decide what animals are more closely related.
(2.3) Let's take a look at how this system works. First we choose an animal. For this exercise we'll choose a bear. Of the five kingdoms you learned above, bear most likely belongs in the kingdom Animalia. Now, if you had a list of all the available phylum, classes, and other taxa for the taxon Animalia, you could probably continue to classify the bear down through until you got to the genus and species. A bear belongs to the phylum Chordata (because it has a spine), the class Mammalia (mammals have many distinguishing characteristics, including hair and producing milk for their young), the order Carnivora (will usually eat meat--some bears are exceptions in this category), the family Ursidae (the bear family of animals). The genus and species are the particular type of bear, in this case let's say it's a brown bear. So our genus would be Ursus, and our species would be arctos.
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Ursidae
Genus:Ursus
Species: arctos
(2.4) So a brown bear would be Ursus arctos. The genus name is always capitalized, the species name is never capitalized. Whenever a scientific name is written it should be underlined or placed in italics.
3. In the breakdown of taxa above there is something missing. There is a category above "kingdom" in the system above, a taxon called "domain." There are three domains. Find out what they are and report them here.
4. If you were going to use morphology, which of these animals would you think is most related to a hawk: a shark, a bat, or an alligator? Explain what morphological criteria you used to make your choice.
Explanation / Answer
3.The three domains are
Bacteria
Archaea
Eukaryota
4. A hawk seems to be more related to an a bat. Morphological criteria used in general body structure I.e presence of wings,streamlined body.