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LIFESC Grade 10: Strand 4 > Biodiversity And Classification > Flashcards

Flashcards in Biodiversity And Classification Deck (23)
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1

What is species diversity?

1. Variety of living organisms in a certain region
2. Variation of different organisms making up an ecosystem

2

What is genetic diversity?

1. Variety of genes within a species
2. Ensure survival of the species

3

What is ecological diversity?

1. Variety of ecosystems found on earth

4

What is a species?

1. Groups of similar organisms that can interbreed freely and produce fertile offspring

5

What is a keystone species?

1. An organism that plays an unusually large role in an ecosystem
2. Important in maintaining species diversity
3. Dies out= many other species die out
E.g. Protea for fynbos ecosystems

6

What is classification?

1. The system of grouping organisms together based on shared characteristics

7

What is taxonomy?

1. The science of classification
2. Grouping of organisms based on similarities/ shared characteristics, using:
•biochemistry
•fossil records
•genetics
•molecular biology

8

What is nomenclature?

1. Naming of organisms

9

What is systematics?

1. Placing of organisms into groups

10

Who was Carolus Linnaeus?

1. Developed the Linnaen system of binomial nomenclature

11

What is the Linnaen system?

1. Greek & Latin (mutual languages) used
2. Uses the hierarchical system- genus
-species
3. Both names underlined or written in italics

12

What is a binomial name?

1. Formal species name consisting of two parts

13

What is a genus name?

1. First part of the name
2. Capital letter first

14

What is a species name?

1. Second part of name
2. No capitals

15

What is classification essential for?

1. Communicating
2. Describing & Placing
3. Arranging collections
4. Understanding relationships
5. Mapping Geographical & Ecological patterns
6. Conservation

16

What are the classification keys?

1. Tables
2. Pictorial
3. Dichotomous
4. Branched (tree)
5. Venn diagram

17

What is hierarchical classification?

1. A highly organized system made up of nested sets of increasing/ decreasing rank
2. Effective way of arranging large groups of objects-artificial
- natural
3. Objects can be easily added and found

18

What are nested sets?

1. Each level is more inclusive as you go up

19

What is a key?

1. Practical device used to name and classify unfamiliar organisms
2. Made of a series. Of written questions/ statements
3. Answers/ choices made in each step lead to final identification

20

What is biodiversity?

• the variety of living organisms on earth

21

What is a prokaryote?

1. No distinct nucleus
2. Lack of complex organelles
3. DNA is free in cytoplasm
4. All prokaryotes are called bacteria

22

What is a Eukaryote?

1. Has a distinct nucleus
2. Have complex organelles
3. DNA lies within nucleus
4. Protists, plants, fungi & animals are eukaryotes

23

What is the criteria used to classify organisms?

1. Body structure
2. Cell wall composition
3. Cell-ultra structure
4. Mode of nutrition
5. Method of reproduction
6. Motility