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Zoology

GENERAL CHARACTERS OF FISHES (PIECES)

  • BS Media
  • | 29 Jun 2017
Fishes are first evolved in silurian period of palaeozoic era. They increased their number in…
Wednesday, 28 June 2017 12:35

AMMOCOETES LARVA

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Ammocoetes Larvae: Matamorphosis   In the life history of Petromyzon a larval form is seen.…
Wednesday, 28 June 2017 12:24

BRANCHIAL BASKET OF PETROMYZON

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Branchial Basket   In Petromyzon the visceral skeleton contains branchial basket. It lies external to…
Myxine (Hagfish) Petromyzon (Lamprey) 1. Hag fishes are scavengers. They penetrate into the dead fishes…
Wednesday, 28 June 2017 10:49

CLASSIFICATION OF CYCLOSTOMATA

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The class Cyclostomata is divided into two orders:1) Petromyzonia and 2) Myxinoidea   Order 1:…
Wednesday, 28 June 2017 10:28

GENERAL CHARACTERS OF CYCLOSTOMES

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Cyclostomes’ are jawless vertebrates. They are primitive vertebrates. The cyclostomes are marine or fresh-water vertebrates.…
Wednesday, 28 June 2017 09:51

CLASSIFICATION OF VERTEBRATA

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SUB-PHYLUM VERTEBRATA is further divided into two super-classes.   AGNATHA, AND GNATHOSTOMATA.   SUPER-CLASS 1.…
Wednesday, 28 June 2017 09:27

CHARACTERS OF VERTEBRATES

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Vertebrates show the following characters, besides the chordate characters.   1. PRESENCE OF ENDO AND…
LARVAE OF PORIFERA Parenchymula (Stereo- gastrula) - Leucosolenia Rhagon - Higher sponges Amphiblastula - Sycon…
Monday, 26 June 2017 20:16

MOST PRIMITIVE ANIMALS

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Most primitive primate Lemur     Most primitive mollusc Chaetoderma     Most primitive Arthropod…
Previously we discussed about various exocrine glands in and foramen in animals. This topic covers…
Sunday, 25 June 2017 16:42

FASTEST ANIMALS IN THE WORLD

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Fastest Mammal — Cheetah (Actiononyx jubatus) Fastest Bird — Spine tailed shift of Japan (fastest…
Saturday, 24 June 2017 20:17

"LARGEST" FACTS IN ZOOLOGY

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Largest mammal — Blue Whale Heaviest mammal — Blue whale Largest Carnivora Kodiak — Beer…
Saturday, 24 June 2017 17:21

FACTS OF ANIMAL WORLD

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Most Intelligent HominidMan (Homo sapiens) Second Most Intelligent MammalDolphin Most Intelligent apeChimpanzee Heaviest bony fishPangarianodon…
Friday, 23 June 2017 20:43

SLOWEST ANIMALS IN THE WORLD

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Slowest Mammal — Sloth Slowest wing beat in bird — Vulture Slowest flying bird —…
Thursday, 22 June 2017 20:02

OVIPAROUS MAMMALS AND SPECIAL VIVIPAROUS ANIMALS

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Viviparous Arthropod — Scorpion Viviparous urodela — Salamendra atra Viviparous Salamender — Salamandra atra Viviparous…
Thursday, 22 June 2017 19:24

LARVAES OF ANIMALS

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NEMATHEHELMETHIS LARVAE   Filariforrn (Roundworm) is larvae of Ancylostoma (Hookworm) Microfilariae is larvae of Wuchereria…
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