Question

12. What are the primary photosynthetic pigments in the (a) Phaeophyta, (b) Rhodophyta, and (c) Chlorophyta?

13. Compare and contrast radial and bilateral symmetry

14. Describe or draw/label what is inside the fleshy lobe of a sarcopterygian fish.

15. What single characteristic of the Arthropoda appears to account for their success, diversity and abundance?

16. How many times did chitin evolve?

Answer 1

12. (a) Chlorophyll a and c (b) Chlorophyll a and d (c) Chlorophyll a and b

13. Bilateral Symmetry: Organisms with bilateral symmetry contain a single plane of symmetry, which divides the organism into two roughly mirror image left and right halves

Radial Symmetry: a basic body plan in which the organism can be divided into similar halves by passing a plane at any angle along a central axis, characteristic of sessile and bottom-dwelling animals, as the sea anemone and starfish