Topic 5.3: Classification of Biodiversity Flashcards Preview

HL Biology > Topic 5.3: Classification of Biodiversity > Flashcards

Flashcards in Topic 5.3: Classification of Biodiversity Deck (85)
Loading flashcards...
1

Define binomial system of nomenclature

The binomial system of nomenclature is the formal system by which all living species are classified (taxonomy)

According to the binomial system of nomenclature, every organism is designated a scientific name with two parts:

Genus is written first and is capitalised (e.g. Homo)
Species follows and is written in lower case (e.g. Homo sapiens)

2

What are the 3 domains of life?

eukarya, archaea, eubacteria

3

Define eukarya

Eukarya – eukaryotic organisms that contain a membrane-bound nucleus (includes protist, plants, fungi and animals)

4

Define archaea

Archaea – prokaryotic cells lacking a nucleus and consist of the extremophiles (e.g. methanogens, thermophiles, etc.)

5

Define eubacteria

Eubacteria – prokaryotic cells lacking a nucleus and consist of the common pathogenic forms (e.g. E. coli, S. aureus, etc.)

6

Define taxonomy

Taxonomy is the science involved with classifying groups of organisms on the basis of shared characteristics

7

What are the 7 taxa in order?

kingdom, phylum, class, order, family, genus and species

8

What is the classification of a human?

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Primate

Family: Hominidae

Genus: Homo

Species: sapiens

9

Describe bryophta

Has no vascularisation (i.e. lacks xylem and phloem)
Has no ‘true’ leaves, roots or stems (are anchored by a root-like structure called a rhizoid)
Reproduce by releasing spores from sporangia (reproductive stalks)
Examples include mosses and liverworts

10

Describe filicinophyta

Has vascularisation (i.e xylem and phloem)
Have leaves, roots and stems (leaves are pinnate – consisting of large fronds divided into leaflets)
Reproduce by releasing spores from clusters called sori on the underside of the leaves
Examples include ferns

11

Describe coniferophyta

Has vascularisation
Have leaves, roots and stems (stems are woody and leaves are waxy and needle-like)
Reproduce by non-motile gametes (seeds) which are found in cones
Examples include pine trees and conifers

12

Define angiospermophyta

Has vascularisation
Have leaves, roots and stems (individual species may be highly variable in structure)
Reproduce by seeds produced in ovules within flowers (seeds may develop in fruits)
Examples include all flowering plants and grasses

13

Which phylum of plants Has no vascularisation (i.e. lacks xylem and phloem)?

Bryophyta

14

Which phylum of plants Has no ‘true’ leaves, roots or stems (are anchored by a root-like structure called a rhizoid)?

Bryophyta

15

Which phylum of plants Reproduce by releasing spores from sporangia (reproductive stalks)?

Bryophyta

16

Which phylum of plants Examples include mosses and liverworts
?

Bryophyta

17

Which phylum of plants Has vascularisation (i.e xylem and phloem)?

Filicinophyta, Coniferophyta, Angiospermophyta

18

Which phylum of plants Have leaves, roots and stems (leaves are pinnate – consisting of large fronds divided into leaflets)?

Filicinophyta

19

Which phylum of plants Reproduce by releasing spores from clusters called sori on the underside of the leaves?

Filicinophyta

20

Which phylum of plants Examples include ferns?

Filicinophyta

21

Which phylum of plants Have leaves, roots and stems (stems are woody and leaves are waxy and needle-like)?

Coniferophyta

22

Which phylum of plants Reproduce by non-motile gametes (seeds) which are found in cones?

Coniferophyta

23

Which phylum of plants Examples include pine trees and conifers?

Coniferophyta

24

Which phylum of plants Have leaves, roots and stems (individual species may be highly variable in structure)?

Angiospermophyta

25

Which phylum of plants Reproduce by seeds produced in ovules within flowers (seeds may develop in fruits)?

Angiospermophyta

26

Which phylum of plants Examples include all flowering plants and grasses?

Angiospermophyta

27

Describe porifera

No body symmetry (asymmetrical)
No mouth or anus (have pores to facilitate the circulation of material)
May have silica or calcium carbonate based spicules for structural support
Examples include sea sponges

28

Describe cnidaria

Have radial symmetry
Have a mouth but no anus (single entrance body cavity)
May have tentacles with stinging cells for capturing and disabling prey
Examples include jellyfish, sea anemones and coral

29

Describe platyhelmintha

Have bilateral symmetry
Have a mouth but no anus (single entrance body cavity)
Have a flattened body shape to increase SA:Vol ratio and may be parasitic
Examples include tapeworms and planaria

30

Describe annelida

Have bilateral symmetry
Have a separate mouth and anus
Body composed of ringed segments with specialisation of segments
Examples include earthworms and leeches

Decks in HL Biology Class (66):