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Write one feature each of liverworts and mosses.
In liverworts. the plant is thalloid. e.g„ Marchantia The thallus is dorsiventral and closely appressed to the In mosses, the predominant stage is the gametophyte. It has two phases (i) Protonema stage which develops directly from a spore. (ii) Leafy stage which develops from the secondarv protonemaRead more
In liverworts. the plant is thalloid. e.g„ Marchantia
See lessThe thallus is dorsiventral and closely appressed to the
In mosses, the predominant stage is the gametophyte.
It has two phases
(i) Protonema stage which develops directly from a
spore.
(ii) Leafy stage which develops from the secondarv
protonema as a leaf bud.
write the types of thallus found in members of Rhodophyceae.
The thallus structure in varies from unicellular to pseudoparenchymatous thallus. (i) Unicellular thallus (Porphyridium). (ii) Filamentous thallus (iii) Pseudoparenchymatous thallus (Gelidium).
The thallus structure in varies from
See lessunicellular to pseudoparenchymatous thallus.
(i) Unicellular thallus (Porphyridium).
(ii) Filamentous thallus
(iii) Pseudoparenchymatous thallus (Gelidium).
List any two advantages of artificial system of classification.
Two advantages of artificial system of classification are (i) Artificial system is very' easv to remember as It uses only one or a few characters comparison. (ii) It is practical and is akin to use of keys for identification of various taxa.
Two advantages of artificial system of classification are
(i) Artificial system is very’ easv to remember as It uses
only one or a few characters comparison.
(ii) It is practical and is akin to use of keys for identification of various taxa.
See lessList any two advantages of artificial system of classification.
The development to the zygotes into young embryo takes place within the female gametophytes is considered as precursor of seed habit.
The development to the zygotes into young embryo
See lesstakes place within the female gametophytes is
considered as precursor of seed habit.
What is kingdom-Plantae?
Kingdorn—Plantae includes multicellular eukaryotic organisms with photosynthetic mode of nutrition, cell wall with cellulose and plastids containing starch as the main reserve food.
Kingdorn—Plantae includes multicellular eukaryotic
See lessorganisms with photosynthetic mode of nutrition, cell
wall with cellulose and plastids containing starch as the
main reserve food.
Which event in pteridophytes is considered an important step in the evolution of seed habit in plants?
The development to the zygotes into young embryo takes place within the female gametophytes is considered as precursor of seed habit.
The development to the zygotes into young embryo
See lesstakes place within the female gametophytes is
considered as precursor of seed habit.
How does the natural system of classification provide detailed information about the groups?
This system is based on common characters of group of organisms, so it can give more or detailed information about the groups of organisms.
This system is based on common characters of group of
See lessorganisms, so it can give more or detailed information
about the groups of organisms.
Which system indicates evolutionary as well as genetic relationships among organisms?
Phylogenetic system of classification.
Phylogenetic system of classification.
See lessWhy the artificial system of classification was not considered reliable by the taxonomists?
The artificial system of classification was based only on gross morphological characters like habit. colour. number, shape of leaves, etc.
The artificial system of classification was based only on
See lessgross morphological characters like habit. colour.
number, shape of leaves, etc.
How are pteridophyte similar to bryophytes?
Pteridophytes also need water for fertilisation like bryophytes.
Pteridophytes also need water for fertilisation like
See lessbryophytes.