DEFINITIONS AND KEY POINTS FOR OBJECTIVES IN AMPHIBIANS

DEFINITIONS AND KEY POINTS FOR OBJECTIVES IN AMPHIBIANS

TERMS DEFINITIONS
Tetrapods The vertebrate with four legs are called tetrapods.

 

Amniotes The vertebrate in which their embryo is covered by a protective membrane are called amniotes. Example: reptile birds and mammals.


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Anamniotes The vertebrate in which their embryo is not coved by a protective membrane are called aminotes. Example  Amphibians. Fishes
   
Caudata The amphibians with tail.
Spermatheca Salamanders   store  the  sperm    in   a  special    pouch   called spermatheca.
Paedomorphosis A phenomenon in which larva become sexually mature while  still showing larval characteristics is called paedomorphosis.
Urostyle The postsacral vertebrae of anurans   are   fused      into  a   rodlike urostyle.
Zygapophyses Every vertebrae has supportive process called zygapophyses.
Lymphatic heart The amphibians have contractile vessels called lymphatic heart.
Ectotherms the  animals which heat from external  sources are  called ectotherms.
Basking The absorption of heat by  sitting in sunshine or other arms environment is called basking.
Accommodation The bending (refracting) of light rays at a focal point on the retina is called focusing of accommodation.
Cloaca A common opening of anus and urinogenital organs is called cloaca.
Osmoregulation The maimiatince of water and salt balance in the body is called osmoregulation.
Nocturnal The animals which come    out   at   day and night for feeding are  called nocturnal.
Diurnal The animal which can come out both at day and night for feeding are called diurnal
Amplexus A method during mating in which male become dorsal to Female and grasp its body is called amplexus.
Vocalization The sound production in amphibians is called vocalization.
Metamorphosis Metamorphosis is a series or abrupt structural. physiological and behavioral changes that transform a larva into an adult.

 

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