Q12 of 19 Page 227

What are four main characteristics of chordates?

All Chordates posses the following features

(a) Have a notochord


(b) Have a dorsal nerve cord


(c) Triploblastic


(d) Have paired gill pouches


(e) Are coelomate


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10

Characteristics of some organisms are given. Identify their group and give one example of each.

(a) Single called, eukaryotic and photosynthetic


(b) The body is divided into segments, may be unisexual or hermaphrodite.


 11

Write two differences between amphibia and reptilia.

 13

Why are local names not sufficient to recognise the organism? What are the advantages of keeping scientific names?

 14

Differentiate between Bryophyta and Pteridophyta. Give one example of each.