5. Classification of Eukaryotes Flashcards Preview

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Flashcards in 5. Classification of Eukaryotes Deck (24)
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1
Q

How many main phyla of plants are there?

A

4

2
Q

How does one distinguish between the 4 main phyla of plants?

A

by studying their external structure

  • roots, stems and leaves
  • reproductive structures
3
Q

What are the 4 main phyla of plants?

A
  • Bryophytes (mosses)
  • Filicinophytes (ferns)
  • Coniferophytes (conifers)
  • Angiospermophytes (flowering plants)
4
Q

Give the characteristic features of the external structure of Bryophytes.

A

roots, stems and leaves:

  • structures similar to root hairs called rhizoids but no roots
  • mosses have simple leaves and stems; liveworts have a flattened thallus
  • no vascular tissue

reproductive structures:

  • spores are produced in a capsule
  • capsule develops at the end of a stalk
5
Q

Give the characteristic features of the external structure of Filicinphytes.

A

roots, stems and leaves:

  • roots, leaves and short non-woody stems
  • leaves curled up in bud and often divided into pairs of leaflets (pinnate)
  • vascular tissue is present

reproductive structures:
- spores produced in sporangia, usually on the underside of leaves

6
Q

Give the characteristic features of the external structure of Coniferophytes.

A

roots, stems and leaves:

  • shrubs or trees with roots, leaves and woody stems
  • leaves often narrow with a thick waxy cuticle
  • vascular tissue is present

reproductive structures:

  • seeds, develop on ovules on the surface of the scales of female cones
  • male cones produce pollen
7
Q

Give the characteristic features of the external structure of Angiospermaophytes.

A

roots, stems and leaves:

  • very variable, usually have roots, leaves and stems
  • stems of shrubs and trees are woody
  • vascular tissue is present

reproductive structures:

  • seeds, develop from ovules inside ovaries in flowers
  • fruits develop from the ovaries to disperse the seeds
8
Q

How many phyla of animals are there?

A

30+

9
Q

Name the 7 large phyla that you need to know recognition features for? (pics p69)

A
  1. Porifera
  2. Cnidaria
  3. Platyhelminths
  4. Annelida
  5. Arthropoda
  6. Mollusca
  7. Chordata
10
Q

Give 4 recognition features of Porifera and an example organism.

(you don’t have to know the example it just helps remember the features)

A
  • no clear symmetry
  • attached to a surface
  • pores through body
  • no mouth or anus

sponge

11
Q

Give 4 recognition features of Cnidaria and an example organism.

(you don’t have to know the example it just helps remember the features)

A
  • radially symmetric
  • tentacles
  • stinging cells
  • mouth but no anus

jellyfish

12
Q

Give 4 recognition features of Platyhelminths and an example organism.

(you don’t have to know the example it just helps remember the features)

A
  • bilaterally symmetric
  • flat bodies
  • unsegmented
  • mouth but no anus

flatworm

13
Q

Give 4 recognition features of Annelida and an example organism.

(you don’t have to know the example it just helps remember the features)

A
  • bilaterally symmetric
  • bristles often present
  • segmented
  • mouth and anus

earthworm

14
Q

Give 4 recognition features of Arthropoda and an example organism.

(you don’t have to know the example it just helps remember the features)

A
  • bilaterally symmetric
  • exoskeleton
  • segmented
  • jointed appendages

scorpion

15
Q

Give 4 recognition features of Mollusca and an example organism.

(you don’t have to know the example it just helps remember the features)

A
  • muscular foot and mantle
  • shell usually present
  • segmentation not visible
  • mouth and anus

snail

16
Q

Give 4 recognition features of Chordata and an example organism.

(you don’t have to know the example it just helps remember the features)

A
  • notochord
  • dorsal nerve cord
  • pharyngeal gill
  • post-anal tail

tiger shark

17
Q

What do almost all chordates have?

A

a backbone consisting of vertebrae

18
Q

How can almost all vertebrate possessing chordata be described? What is the exception?

A
  • as tetrapods with pentadactyl limbs, though in some species the limbs have become modified or lost through evolution
  • fish ( they don’t have the above)
19
Q

Name the 5 major classes of vertebrate.

A
  1. Bony ray-finned fish
  2. Amphibians
  3. Reptiles
  4. Birds
  5. Mammals
20
Q

Give 5 recognition features of Bony ray-finned fish.

A
  • scales grow from the skin
  • gills with a single gill slit
  • fins supported by rays
  • swim bladder for bouyancy
  • external fertilization
21
Q

Give 5 recognition features of Amphibians.

A
  • soft moist permeable skin
  • lungs with small internal folds
  • external fertilization in water
  • protective gel around eggs
  • larval stage lives in water
22
Q

Give 5 recognition features of Reptiles.

A
  • dry scaly impermeable skin
  • lungs with extensive folding
  • internal fertilization
  • soft shells around eggs
  • one type of teeth
23
Q

Give 5 recognition features of Birds.

A
  • feathers growing from skin
  • lungs with parabronchial tubes
  • wings instead of front legs
  • hard shells around the eggs
  • beak but no teeth
24
Q

Give 5 recognition features of Mammals.

A
  • hairs growing from the skin
  • lungs with alveoli
  • give birth to live young
  • mammary glands secrete milk
  • teeth of different types

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