Question

5) Compare and contrast Archaea and Bacteria.

6) How have protists traditionally been classified? Explain and provide an example of each.

7) To conquer the land, what sort of adaptations did early land plants have to develop?

8) Compare and contrast nonvascular plants and vascular plants.

Answer 1

5)

Archaea	Bacteria
They are primitive prokaryotic bacteria	These are true bacteria
They are live in extreme environmental conditions like high temperature , high salt concentrations,acidic pH etc.	they are found in every where
cell wall is composed of proteins and polysaccharides	rigid cell wall composed of proteins and lipids
peptidoglycan is absent	peptidoglycan is present
circular DNA with histones	circular DNa
membrane lipid are Ether linked	Ester linked

6)

PROTISTA Euglenoids Dienoflagellate eg Gongacular Slime eg: Euglena chrysophytes es physaan Ditons og Pioularia Desmids eg. cosmarium Protozoa A cboid Flagellate : Tripanosoma ciliated EJ: Pakaboeciuro sporozoa Eg: plastica Ertaroeba

Chrysophytes - They are microscopic unicellular eukaryotes .They are photosynthetic , aquatic organisms .This include Diatoms ans Desmids.

Dinoflagellates- They are biflagellate protists, mostly marine , photosynthetic.

Euglenoids-Wall less flagellated protists, mostly freshwater,body enriched protein rich covering called pellicle.

Slime moulds-They are saprophytic protists, during favourable condition they form an aggregation called Plasmodium

Protozoans - they are heterotrophic protists which lives as parasites or predators.

7)

• embryo retension
• waxy cuticle to reduce water loss
• stomata - small pores for gaseous exchange
• vascular tissue for absorption of water and minerals

8)

Non vascular plants	vascular plants
No vascular system	presence of vascular system
gametophyte is dominant	sporophyte is dominant phase
gametophyte is haploid	sporophyte is diploid
least specialised roots and tissues are non lignified	lignified xylrm well developed root,stem and leave structure
water absorption by diffusion or osmosis	water absorptio passively by roots
eg are algae, bryophytes and mosses	includes ferns,conifers,and angiosperms