Question

Match the following group of organisms with their respective distinctive characteristics and select the correct option:

• A. $\left(a\right)-\left(iii\right),\left(b\right)-\left(iv\right),\left(c\right)-\left(i\right),\left(d\right)-\left(ii\right)$
• B. $\left(a\right)-\left(ii\right),\left(b\right)-\left(iii\right),\left(c\right)-\left(iv\right),\left(d\right)-\left(i\right)$
• C. $\left(a\right)-\left(iv\right),\left(b\right)-\left(i\right),\left(c\right)-\left(ii\right),\left(d\right)-\left(iii\right)$
• D. $\left(a\right)-\left(i\right),\left(b\right)-\left(ii\right),\left(c\right)-\left(iii\right),\left(d\right)-\left(iv\right)$

Answer 1

The correct option is A $\left(a\right)-\left(iii\right),\left(b\right)-\left(iv\right),\left(c\right)-\left(i\right),\left(d\right)-\left(ii\right)$

a. The first bilaterally symmetrical animals belong to the phylum Platyhelminthes. Members of this phylum have an incomplete digestive system, with a single opening that serves both for ingestion and egestion.

b. Adult echinoderms exhibit radial symmetry. Development in echinoderms is indirect as there is a larval stage which is distinct from the adult.

c. Hemichordates are non-chordates with a cylindrical body that lacks segmentation.

d. Aves includes the feathered bipeds (birds), these are warm blooded animals as they maintain a constant body temperature. Development in birds is direct as there is no larval stage.