5. Naming and Identifying Flashcards Preview

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Flashcards in 5. Naming and Identifying Deck (12):
1

What happens when a new species is discovered?

they are named

2

What system is used to name species?

using the binomial system

3

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

4

What is the binomial system a good example of?

cooperation and collaboration between groups of scientists

5

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

6

Give 2 examples of binomials.

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

7

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

8

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

cylindrical stems with whorls* of leaves

9

What is the first stage in many ecological investigations?

Find out what species of organism in area are being studied

10

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

Using a dichotomous key

11

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

12

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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