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Miss Mrunal Thombare

Mar 13, 2015

Write some differences between each of the following. (a) Amphibians and Reptiles (b) Aves and Mammals (c) Gymnosperms and Angiosperms.

Write one point difference between each of the following. (a) Amphibians and Reptiles (b) Aves and Mammals (c) Gymnosperms and Angiosperms.



Aruna kavitha Singupilla

a) Amphibia and Reptilia are the classes belonging to Vertebrata.
*Amphibians are cold-blooded animals. Amphibians can live both on land and in water. They are the first vertebrates to have four limbs, each with five digits and are called tetrapods. Respiration is by skin and lungs. They possess a three-chambered heart. Amphibians reproduce by laying eggs.
*Reptilia are cold-blooded animals. They have four limbs with five fingers or toes each, and hence, are called pentadactyle tetrapods. Respiration is through lungs. Hearts are three-chambered except for crocodiles. Reptiles also reproduce by laying eggs.

b) Aves and mammals are the higher group of organisms belonging toVertebrata.
*Aves are warm-blooded animals bearing three clawless digits. Fore-limbs are modified into wings which aid in flight. Their hind limbs are strong and are developed for walking. Bones are hollow. Body is covered by feathers. Respiration is through lungs. They have four-chambered heart. They lay eggs which hatch into chicks.
*Mammals are warm-blooded animals. Their skin is covered by hair, sweat glands and oil glands that regulate body temperature, thereby allowing them to live in diverse habitats. Breathing is through lungs. Four-chambered heart is present. Mammals have milk-producing glands called as mammary glands to nourish their young ones. 

c) Angiosperms and gymnosperms belong to the sub-kingdom phaenerogamae.
*Angiosperms are seed producing flowering plants whose seeds are enclosed in the ovary.Angiosperms possess flowers which enclose the reproductive structures. Angiospermic flowers can be unisexual or bisexual. Angiosperms are non-perennial 
*Gymnosperms are seed producing non-flowering plants whose seeds are naked. Gymnosperms have the reproductive structures present in cones. Seeds in Gymnosperms are bare found on cones. Gymnosperms are perennial. 

Miss Mrunal Thombare

(a) Reptiles lay eggs with tough coverings and do not need to lay their eggs in water, unlike amphibians.
(b) Aves are warm-blooded animals and have a four-chambered heart. They lay eggs. 
warm-blooded animals and have a four-chambered heart. They have mammary gland and give birth to child. (c) Gymnosperm bear naked seeds where as angioosperm bear seeds inside fruit
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