Biology today

(Grace) #1
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  1. a stage of prophase in meiosis-1 in which synapsis of homologous
    chromosomes takes place. (8)

  2. The accumulation of tissue fluid in the tissues of the body causing
    swelling of the affected part. (6)

  3. The resemblance of one animal to another, which has evolved as a
    means of protection. (7)

  4. a semisynthetic penicillin used to treat a variety of infections including
    urinary, respiratory, biliary and intestinal tracts. (10)

  5. The dorsal flap of earthworm’s intestine which increases the surface
    area of the intestine for efficient secretion and absorption during
    digestion. (10)

  6. The minute gap across which nerve impulses pass form one neuron to
    the next. (7)

  7. an achene fruit derived from an inferior ovary which is the characteristic
    of Family asteraceae. (7)

  8. The tissue in the Family Gramineae seed which lies between the
    embryo and the endosperm. (9)

  9. a group of loosely arranged achlorophyllous or colourless and
    parenchymatous cells of hydathode. (7)

  10. One of the three bones of the innominate bone which forms part of
    the pelvis. (5)
    


ACROSS



  1. a cluster of ribosome which is connected with mrNa and
    play an important role in peptide formation. (8)

  2. a type of seed germination in which the cotyledons emerge
    from the ground and function as true leaves. (7)

  3. The mobile connective tissue which acts as middle man and
    an important carrier for nutrients, hormones etc. (5)

  4. a colourless allotrope of oxygen which is found naturally
    in stratosphere layer and absorbs the ultraviolet rays of
    incoming solar radiation. (5)

  5. The last geological period of the palaeozoic era during which
    origin of conifers occur. (7)

  6. a hormone, produced by mucosa of the stomach and first
    part of the duodenum, that controls the release of gastric
    juice. (7)

  7. “The Darwin of the 20th century” who was awarded the three
    prizes widely regarded as the triple crown of biology. (4)

  8. The vascular cylinder which consists of xylem, phloem
    and pericycle, and in some cases pith and medullary rays
    also. (5)

  9. a fleshy, coloured covering on the seed which arises as an
    upgrowth of the funicle or base of the ovule, and may be a
    tuft of hairs. (4)

  10. The pigmented ring of muscular tissue, which lies between
    the cornea and the lens, of vertebrates eyes. (4)

  11. a special device which is made of stainless steel resembling
    a spring coil and can be permanently placed in an artery
    through a catheter. (5)

  12. a fibrous protein which is the major constituent of the yellow
    elastic fibres of connective tissue and rich in glycine, alanine, proline
    and other nonpolar amino acids. (7)

  13. a terrestrial biome consisting mainly of evergreen coniferous forests
    which occur across subarctic North america and eurasia. (5)

  14. The study of methods of improving the quality of human population by
    the application of genetic principles. (8)

  15. a genetic element that can exist and replicate either independently
    of its host cells chromosomes or as an integrated part of the
    chromosomes. (7)

  16. a localised group of cells which are actively dividing and
    undifferentiated but ultimately gives rise to permanent tissue. (8)


DOWN



  1. The process of cell death that occurs naturally as part of the normal
    development, maintenance and renewal of tissues within an organism. (9)

  2. The study of different aspects or appearance of plants in different
    seasons of a year. (9)

  3. a class of arthropods which includes animals such as scorpions,
    spiders, ticks and mites etc. (9)

  4. The secretion of the posterior lobe of pituitary gland is called ____
    which contains oxytocin and antidiuretic hormone. (9)


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