Question

explain subphyllum vertebrata??

Answer 1

$\textbf{Hey..mate here is yur ans...}$
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⏩ $\textbf{VERTEBRATA}$ ⏪

⏩ They all consists $\blue{vertebral - column}$ which is made up of $\pink{cartilage}$ or $\red{bone.}$

⏩ Locomotion by $\textbf{fins or limbs.}$

⏩ Circulation is $\orange{closed - type}$ with two, three or four chambered heart.

⏩ Excretion by $\purple{mesonephric -or -metanephric -kidney.}$

⏩ $\textbf{Protonephric kidney}$ also found in some stages.

⏩ Sub Phyllum vertebrata also divided into $\textbf{two sections....}$➡

⏩ $\textbf{Section 1}$ ⏪

♦ $\pink{Agnatha}$ ♦

⏩ The most primitive vertebrates originated during $\purple{ordovician -period}$ of $\pink{protozoic- era.}$

⏩ They are called $\textbf{Jawless fishes.}$

⏩ They are not true fishes but they are $\red{ancestors}$ of true fishes.

⏩ Mouth $\green{without -jaws.}$

⏩ Skin without $\pink{scales.}$

⏩ $\textbf{Cranium and endoskeleton}$ is made up of bone or cartilage.

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$\textbf{Hope it helps u}$✌

Answer 2

Hey mate ♥️♥️♥️

Here's ur answer.......❤️❤️

Ans¶} Subphylum Vertebrata ..............

♠️1) The members of Subphylum Vertebrata possess notochord during the embryonic period.

♠️2) The notochord is replaced by vertebral column in adult age.

♠️3) Vertebrates have ventral mascular heart with 2,3 or 4 Chambers , kidneys for excretion and osmoregulation and paired appendages which may be fins or limbs.

Hope it helps

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♠️4) Examples are as follows - Humans , frogs , birds etc......