Allen physics handbook (new version) 2021

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physics question bank for (Neet, jee, 11th, 12th)

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UNIFORM MOTION  1. A particle starts from rest  and moves with constant acceleration a. what is the nature of the graph between the time (t) and the displacement.    (a) straight line  (b) instant velocity  (c) average speed  (d) average velocity  2. A particle starts with velocity  u and moves with constant acceleration  a .what is the nature of the graph between the time (t) and the displacement (x).   (a) straight line  (b) symmetric parabola  (c) Asymmetric parabola  (d) Rectangular hyperbola 3. For motion on a curved  path with constant acceleration [magnitude of displacement /distance covered   (a) >1    (b) ≥ 1    (c) ≤ 1    (d) <1  4. A particle moving with uniform speed can possess :  (a) radial acceleration  (b) tangential acceleration  (c) both radial and tangential accelerations  (d) neither radial nor tangential accelera...
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BRYOPHYTA KEY CONCEPTS ( NEET )

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BRYOPHYTA   (1) Bryophyta (Gk: Bryon = moss; phyton = plants) includes the simplest and primitive land plants. ( 2 ) Due to the peculiar type of their habitats, they are regarded as 'the amphibians of the plant kingdom'.  (3) Habitat: Bryophytes usually grow in moist and shady places.  (4) Specialized  habitats: Some bryophytes grow in diverse habitats such as    (a) Aquatic (e.g., Riccia fluitans, Ricciocarpus natans, Riella), epiphytes (e.g., Dendroceros, Radula protensa and many mosses), saprophytes (e.g., Buxbaumia aphylla, Cryptothallus mirabilis)    (b) Dry habitats such as dry heaths (e.g., Polytrichum juniperinum), deserts (e.g., Tortula desertorum) and dry rocks (e.g., Porella platyphylla).  (5) Sexual reproduction:   The male sex organ is called as antheridium and the female as archegonium.  (6) Salient features of classes       (i) Hepaticopsida: The latin word Hepatica means liver. T...
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