The heterosporous nature of Selaginella is considered an evolutionary advancement because it:
Leads to the development of seeds
Increases the number of spores produced
Allows for asexual reproduction
Simplifies the gametophyte generation
Related Questions
A researcher discovers a new animal species exhibiting radial symmetry, a diploblastic body plan, and cnidocytes. This organism most likely belongs to which phylum?
Cnidaria
Platyhelminthes
Echinodermata
Porifera
During conjugation in Paramecium
Out of the four micronuclei formed, three degenerate
Out of six macronuclei formed, four degenerate
Zygote nucleus undergoes eight successive division in each conjugant
Out of 16 nuclei, only 4 degenerate
Plant virus contains
DNA
RNA
Both (a) and (b)
Plasmids
Which of the following is NOT a characteristic of the Pteridophytes?
Vascular tissue
Spores
Seeds
Independent sporophyte
Kingdom-Animalia organisms
I. are capable of Iocomotion
II. have specialised sensory and neuromotor system
III. shows sexual mode of reproduction
IV. show the sexual reproduction by copulation of male and female followed by embryological development
Which of the statements given above are correct
I and II only
II only
II and III only
I, III and IV only
Plant virus contains
DNA
RNA
Both (a) and (b)
Plasmids
Which unique characteristic differentiates the phloem sieve tubes of angiosperms from those of gymnosperms?
Presence of companion cells
Presence of sieve plates
Transport of sugars
Bidirectional translocation
In which plant group does double fertilization occur?
Bryophytes
Pteridophytes
Gymnosperms
Angiosperms
What is the primary mode of nutrition in animals?
Autotrophic
Heterotrophic
Chemosynthetic
Photosynthetic
Plants have a/an…… in their life cycle
Sexual phase only
Asexual phase only
Alternation of generations
Haplontic
