Question

(a) Identify the organism in the following figure.
(b) Label the parts numbers 1 to 4.
(c) Name the phylum in which notochord is present.
(d) Name the subphylum in which notochord is present throughout life.

Answer 1

Explanation:

(a) The organism in the above figure is Amphioxus i.e., Branchiostoma (scientific name). These organisms are a close relative of vertebrates looking like a snake.

(b) The parts in the figures are  

          1. Nerve Cord

          2. Notochord

          3. Atriopore

          4. Oral Hood

(c) The phylum in which a notochord is present is called as Chordata.

(d) The subphylum in which the notochord is present throughout life is called as Cephalochordate. It had the notochord which covers from head to tail.

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Answer 2

Answer:

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