Study specimens C, D and E carefully and answer questions 1(a) to 1(C). (a) (i) Name the phylum to which specimens C and E belong. (ii) State two reasons fo...
Question 1 Report
Study specimens C, D and E carefully and answer questions 1(a) to 1(C).
(a) (i) Name the phylum to which specimens C and E belong. (ii) State two reasons for the answer in 1(a)(i).
(b) State three observable structural differences between the following specimens. (i)C and D (ii) C and E.
(C) What is the relationship between specimens C and D?
(d)(i)) Name the habitat of specimen D. (ii) State two ways in which specimen D is adapted to its habitat.
(C) Make a drawing, 8cm - 10cm long of the dorsal view of specimen C and label fully.
Answer Details
(a) (i) Specimens C and E belong to the phylum Arthropoda.
(a) (ii) Reasons:
- They have segmented bodies.
- They possess jointed appendages and a hard chitinous exoskeleton.
(b) Observable structural differences
(i) Specimens C and D
| Specimen C: Butterfly | Specimen D: Caterpillar |
|---|---|
| Has two pairs of wings. | Has no wings. |
| Has a long sucking proboscis. | Has biting and chewing mandibles. |
| Prolegs and claspers are absent. | Prolegs and claspers are present. |
(ii) Specimens C and E
| Specimen C: Butterfly | Specimen E: Grasshopper |
|---|---|
| Has a sucking proboscis. | Has biting and chewing mandibles. |
| Antennae are clubbed or knobbed. | Antennae are tapering and not clubbed. |
| Wings are soft, membranous and covered with scales. | Wings are firmer and not covered with scales. |
| Hind legs are relatively short and not adapted for jumping. | Hind legs are long, muscular and adapted for jumping. |
(c) Specimen D is the larval stage of specimen C. Specimen C is the adult butterfly, or imago, of specimen D. They are stages in the complete metamorphosis of the same insect.
(d) (i) Specimen D lives on green plants, especially on leaves in gardens, farms and vegetable plots.
(d) (ii) Adaptations of specimen D to its habitat include:
- It has strong mandibles for biting and chewing leaves.
- It has three pairs of clawed true legs, prolegs and claspers for gripping and climbing on leaves and twigs.
- Its body colour and pattern provide camouflage among leaves.
(e) Dorsal view of specimen C, Butterfly
Drawn at a length of 8 to 10 cm and fully labelled:
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