Question

q1) mention three reasons why reptiles are sucessful in land?
q2) why are whales not group in fishes?
q3) give two differences between cartilageous and bony fish.
q4) mention three characteric of phylum chordata
q5) what are the two characteristic features of present aves. why are the bones of the birds so light.
q6) classify on the based on number of chambers in the heart
i)rohu
ii) coliodon
iii) frog
iv) chalamender
v) lizard
vi) flying cobra
vii) crocodile
viii) ostrich
ix) pigeon
x) bat
xi) whale

Answer 1

q1) Because the reptile are not all good swimmers and are cold blooded.
q2)Because whales have fur, give milk to babies and also give direct birth to babies instead of laying eggs.
q3)Chondrichthyes is a class that contains the cartilaginous fishes: they are jawed vertebrates with paired fins, paired nares, scales, a heart with its chambers in series, and skeletons made of cartilage rather than bone whereas Osteichthyes, popularly referred to as the bony fish, is a diverse taxonomic group of fish that have skeletons primarily composed of bone tissue, as opposed to cartilage.
q4)Characteristics of Chordata
a notochord.
a dorsal hollow nerve cord.
pharyngeal slits.
post-anal tail.
q5)The characteristics of aves is that the aves lay eggs and have feathers. They also have light bones to help then I their flight.
q6) 2 chambers-rohu,coliodon
3 chambers-frog,chalamanxder, lizard, flying cobra
4chambers-crocodile,ostrich,pigeon, bat, whale

Answer 2

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┗─━─━─━─━∞◆∞━─━─━─━─┛

❶❭ Reptiles are sucessful on land because:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵

❱ Internal fertilisation.
❱ Lungs for Breathing.
❱ Egg is surrounded by a shell.

❷❭ Whales are not group in fishes because they are Mammals. They produce young ones.

❸❭ Difference between Cartilaginous & Bony Fish:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵

➀❭ Cartilaginous Fishes:-
━━━━━━━━━━━━━━━☟

◉ Mouth is ventral.
◉ It is totally marine.
◉ Tail is heterocercal.
◉ Endoskeleton is Cartilaginous.

②❭ Bony Fishes:-
━━━━━━━━━━━━━☟

◉ Mouth is terminal.
◉ It is freshwater.
◉ Tail is homocercal.
◉ Endoskeleton is Bony.

❹❭ Characteric of phylum chordata:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵

❱ A notochord.
❱ Dorsal nerve cord.
❱ Pharyngeal slits.
❱ Post-anal tail.

❺❭ Features of Aves are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵

❱ Feathers are present.
❱ These are warm blooded.
❱ Mammary gland is absent.
❱ Respiration by lungs with air sacs.

♦ Aves bones are light due to Air cavities.

❻❭ No. of chambers in the heart:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵

❱ Two Chambered heart:-
━━━━━━━━━━━━━━━☟

◉ Rohu
◉ Scoliodon

❱ Three Chambered heart:-
━━━━━━━━━━━━━━━━━☟

◉ Frog
◉ Lizards
◉ Salamander
◉ Flying Cobra

❱ Four Chambered heart:-
━━━━━━━━━━━━━━━━☟

◉ Bat
◉ Whale
◉ 0strich
◉ Pigeon
◉ Crocodile

_________
Thanks...✊