Biology · Biological Classification · NEET
The plant cell wall is made mainly of cellulose. This is a very common NEET trap. Fungi have a chitin wall, and Monera (bacteria) have a wall of polysaccharides plus amino acids (peptidoglycan). So if a question says 'cell wall made of cellulose', the answer is Plantae, not Fungi.
Most members are autotrophic. They contain chlorophyll and make their own food by photosynthesis. But NCERT clearly says a few members are partially heterotrophic. Insectivorous plants like Venus fly trap and Bladderwort trap insects, and parasites like Cuscuta take food from a host plant. These exceptions are heavily tested.
Plantae includes five groups: algae, bryophytes, pteridophytes, gymnosperms, and angiosperms. A simple memory line is 'Algae Bring Plants Great Advances' (A-B-P-G-A). Algae are the simplest and angiosperms (flowering plants) are the most advanced.
Every plant life cycle has two phases that alternate: a diploid sporophyte phase (2n, spore-making) and a haploid gametophyte phase (n, gamete-making). One phase follows the other, again and again. The length of each phase and whether it is free-living or dependent differs between groups. NCERT calls this alternation of generations.
Both have cell walls, so that alone cannot separate them. The difference is the wall material and the nutrition. Plantae: cellulose wall + chlorophyll + autotroph. Fungi: chitin wall + no chlorophyll + heterotroph (saprophyte or parasite). NEET loves to test that both have walls but of different types.
Yes. Plant cells have a eukaryotic structure with prominent chloroplasts. Chloroplasts contain chlorophyll, the green pigment that traps sunlight for photosynthesis. This is exactly why NCERT defines Plantae as the 'chlorophyll-containing' eukaryotic kingdom.
Each of the following characteristics represent a Kingdom proposed by Whittaker. Arrange the following in increasing order of complexity of body organization. A. Multicellular heterotrophs with cell wall made of chitin. B. Heterotrophs with tissue/organ/organ system level of body organization. C. Prokaryotes with cell wall made of polysaccharides and amino acids. D. Eukaryotic autotrophs with tissue/organ level of body organization. E. Eukaryotes with cellular body organization.
Select the wrong statement:
Try the real previous-year questions from this chapter — each with the answer and a full solution.
Chlorophyll, the green pigment inside chloroplasts. It traps sunlight so plants can make food by photosynthesis. This is why NCERT calls Plantae the chlorophyll-containing kingdom.
No. Most are autotrophic, but a few are partially heterotrophic. Insectivorous plants (Venus fly trap, Bladderwort) trap insects, and parasites (Cuscuta) take food from a host.
Eukaryotic. Plant cells have a true nucleus and membrane-bound organelles like prominent chloroplasts, unlike prokaryotic Monera.
Plantae shows tissue and organ level of body organization, which is more advanced than the cellular level of Protista but less than the organ-system level of Animalia.
