Biology today

(Grace) #1

  1. Myrmecophaga Giant
    anteater


•    Anteaters are characterised by long tapering snouts, tubular mouth, without
teeth and long sticky protrusible tongue for capturing ants and termites which
are swallowed whole.
• Their forefeet have long, sharp claws for digging the anthills.


  1. Dasypus Armadillo • Dasypus novemcinctus, the nine-banded armadillo is found in
    N. America, Central and S. America.
    • These are the only living mammals that have bony plates in their skin.
    The plates are intercepted by hair.
    • At the time of danger, it rolls up into a ball for protection. It is nocturnal,
    scavenger and lives in burrows.
    • It shows polyembryony in which one zygote produces four to eight young ones
    of the same sex.
    • Mycobacterium leprae (bacteria which cause leprosy) can grow in Armadillo.
    Pholidota

  2. Manis Pangolin • Scaly anteaters or pangolins have their home in tropical Asia and Africa and
    belong to the single genus Manis.
    • They live on ground, in burrows or in trees and range from 30 cm to
    1.5 metres in length.
    • They have a long, sticky, extensile tongue with muscular roots, used for feeding
    on termites or white ants. It does not have teeth.
    • When attacked, they roll themselves into a ball for defence, like Armadillos.
    Primates

  3. Lemur Lemur • They are most abundant in Madagascar and neighbouring islands and are
    regarded to be the lowest primates.
    • Tail is long and non-prehensile.
    • Vision is poor.
    • It feeds mostly on plants and small animals.

  4. Loris Loris • Lorises are found outside Madagascar.
    • They are arboreal, nocturnal and have a tooth comb.
    • They also eat fruits and small animals. However, they are tailless, move slowly
    and often hang upside down.

  5. Macaca Rhesus
    monkey


•    One of the best known Old World monkeys is the rhesus monkey or ‘bandar‘,
Macaca mulatta.
• It is common in northern India, southern China and Indochina (Vietnam).
• It is widely used in biological investigations. The Rh blood factor was first
discovered in these monkeys.
• It has simple stomach and large cheek pouches for storing food.


  1. Hylobates Gibbon • Gibbon is the smallest and cleanest of all apes. It is found in the rain forests of
    Assam, S.E. Asia and Indonesia.
    • It lives almost entirely on trees swinging rapidly from branch to branch by its
    long arms and famous for its acrobatics.
    • It is frugivorous.
    • Gibbons live in pairs and make loud territorial calls.

  2. Pongo Orangutan • Confined to the low-lying forests of Sumatra and Borneo.
    • Orangutan means ‘man of the woods‘.
    • Body is 1.5 metres high with long arms, short legs and long shaggy red hair.
    • It is mainly arboreal, feeding on buds and fruits. It constructs a sort of nest on
    tree top for living. On ground, it walks on its feet and knuckles.

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