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Showing posts from August, 2023

Reproductive Structures of Pteridophyte

  Reproductive Structures of Pteridophyte The Pteridophyte sporophyte, besides being a prominent component of soil and vegetation, is an important ornamental plant in gardens and lawns. Indoors, its gracefulness and shape fit it ideally as a plant for pot culture in hallways and living rooms, especially during the months of November to March. Transportation of whole plants from one place to another without damage is attempted by packing them in sand, decomposed silt, ashes, or sawdust. Despite their rich horticultural value, many Pteridophytes are vanishing from nature due to indiscriminate destruction of their natural habitats and capturing of species for ornamental purposes. The best means of conservation is an adequate botanical knowledge of these plants, together with their habitats. The approaches of the non-destructive collection of herbarium specimens are now being stressed. The collection is also supplemented with data regarding the locality and habitat, so as to make it de...

MCQ BIOLOGY2023-01

  1. Which cells have routinely used to understand structure of plasma membrane? a) Neurons                    b) Mylein cells c) RBC                         d) Stem cells   2. Cholesterol contributes to which of the following properties of biological membranes of animals? a) Membrane rigidity   b) Membrane fluidity c) Membrane permeability d) Membrane osmolarity   3. Cell membrane is always a) Static condition b) Dynamic condition c) Partially static condition      d) Fragmented structure   4. Which of the following statements concerning biological membrane is correct? a) Aquaporins are hollow pore b) Lipid composition of two layers of the membrane equilibrate c) The membrane is most fluid at the surface d) Fli...

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