Q1 of 525 Page 239

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.

(a) The figure illustrates Amphioxus (Branchiostoma).

(b) 1. Nerve Cord; 2. Notochord; 3. Atriopore; 4. Oral hood

(d) In cephalochordate, notochord extends from head to tail and is persistent throughout the life.

List a fer'flight adaptations in birds.

Why whales arc not grouped in the fishes?

(a) Identify the organism.

(b) Label the part a1 and 2.

(a) To which group this organism belongs?

(b) Label the parts marked 1 to 7.

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.