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Flashcards in 5. Naming and Identifying Deck (12):

What happens when a new species is discovered?

they are named


What system is used to name species?

using the binomial system


Give a critical strength of the binomial system. How was the binomial system developed? Why is the binomial system used?

- its universal (everyone has to use it = less confusion)
- developed at a series of international congresses
- used because it avoids confusion that would result from using the many different local names that can exist for a species


What is the binomial system a good example of?

cooperation and collaboration between groups of scientists


What are the features of the binomial system?

- first name is the genus (a group of closely related species)
- genus name is given an upper case first letter
- second name is the species name
- species name is given a lower case first letter
- italics are used when a binomial appears in a printed or typed document


Give 2 examples of binomials.

1. Homo sapiens - humans
2. Scrophularia landroveri - a plant discovered by an expedition that travelled in a Land Rover


Name the 4 genera (plural of genus) that many aquatic plants in aquariums in biology laboratories belong to.

1. Cabomba
2. Elodea
3. Ceratophyllum
4. Myriophyllum


What feature do the aquatic plants in the 4 genera have in common?

cylindrical stems with whorls* of leaves


What is the first stage in many ecological investigations?

Find out what species of organism in area are being studied


How does one find out what species of organism in area are being studied?

Using a dichotomous key


State 4 features of a dichotomous key

- consists of a series of numbered stages
- each stage = pair of alternative characteristics
- some alternatives give next numbered stage to go to
- eventually, identification of species will be reached


What characteristics should you look for when constructing a dichotomous key?

- easy to observe and reliable (present in every member of species)

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