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
What is the primary function of the phloem in plants?
Water transport
Mineral transport
Transport of sugars
Support and structure
Regarding plants, choose the correct statement
All plants have vascular tissues.
All plants produce seeds.
All plants perform photosynthesis.
All plants reproduce asexually.
Which of the following characteristics is NOT common to both Plantae and Animalia?
Eukaryotic
Multicellular
Autotrophic
Heterotrophic
Which feature distinguishes Aschelminthes from Platyhelminthes?
Presence of a pseudocoelom
Bilateral symmetry
Triploblastic body plan
Presence of a digestive system
Consider the following statement about plants
I. Kingdom-Plantae includes eukaryotic autotrophic, chlorophyll containing organisms
II. It includes algae, bryophytes, pteridophytes, gymnosperms but not angiosperms
III. Plants shows alternation of generation [between haploid gametophytic (n) phase and diploid sporophytic (2n) phase]
Which of the statements given above are correct?
I and II
I and III
II and III
I, II and III
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
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
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
Which of these best describes the sporophytic generation in plant’s life cycle?
The haploid generation
Generation that produces the gametes
Generation that produces spores
Generation that has xylem and phloem
Which of the following is NOT a characteristic of the Pteridophytes?
Vascular tissue
Spores
Seeds
Independent sporophyte
