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Biology Test 38

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Biology Test 38
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Weekly Quiz Competition
  • Question 1
    4 / -1

    In the sub-phylum (a) notochord is present only in the larval tail, while in (b) it extends from head to tail region and is persistent throughout their life. Choose the correct option:

    Solution

    In Urochordata, notochord is present only in larval tail. In Cephalochordata, notochord extends from head to tail region and is persistent throughout their life.

  • Question 2
    4 / -1

    In Scoliodon, Ampulla of Lorenzini acts as

    Solution

    Ampulla of lorenzini is special sensing organ in cartilaginous fish. It acts as thermoreceptors in scoliodon.

  • Question 3
    4 / -1

    Choose the correct pair of an amniotes:

    Solution

    Amniotes lay their eggs on land or retain the fertilized egg within the mother. All reptiles and specific mammals like platypus are found to lay eggs on land or retain the fertilized egg within mother.

  • Question 4
    4 / -1

    Select the one which do not possess coelom:

    Solution

    Hemichordate, chordate and arthropods are coelomates. Ctenophores are acoelomates.

  • Question 5
    4 / -1

    In which protozoan group total parasites belongs to

    Solution

    Total parasites belong to the protozoan group Sporozoa.

  • Question 6
    4 / -1

    Which of these algal species does not contain a unicelled sex organ?

    Solution

    chara reproduces vegetatively and sexually. Vegetative reproduction takes place through tubers, amylum stars and secondary protonema. The means of sexual reproduction are globules or antheridium and nucule or archegonium. The sex organs are multicellular and jacketed.

  • Question 7
    4 / -1

    Male gametophyte with least number of cells is present in :

    Solution

    Male gametophyte with least number of cells is present in Lilium.

    Lilium is an angiosperm which possesses the male gametophyte with least number of cells. The number of cells in male gametophyte shows the pattern of reduction from bryophytes to angiosperms.

    In angiosperms, it is reduced to about 2-3 celled and called as pollen grains. 

  • Question 8
    4 / -1

    Anthoceros are different from blue green algae in which of the following ways?

    Solution

    in anthoceros, the embryo develops into sporophyte. Sporophyte is diploid generation in life cycle of anthoceros. The sporophyte will differ from other bryophytes due to its semi dependence on gametophyte. Epidermis has stomata and this feature makes it independent from gametophyte in later stages of growth.

  • Question 9
    4 / -1

    Which of the following has transfusion tissue in its leaves?

    Solution

    transfusion tissues in gymnosperm leaves. It is universal in leave sof gymnosperms. It is made of three different kinds of the cells. They are: thick walled tracheids, parenchyma and albuminous cells. They also consist of trasnsfusion parenchyma, sclerenchyma and accessory transfusion.

  • Question 10
    4 / -1

    Another name for maiden hair fern is

    Solution

    Adiantum 
    Adiantum or maiden hair fern are soft and lacy plants. It is a genus of 250 species of ferns.

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