Study Specimens P(Cockroach), and Q(Grasshopper) and answer questions 4(a) to 4(e). (a)(i) State the sex of specimen P. (ii) Give one reason tor the answer ...
Question 1 Report
Study Specimens P(Cockroach), and Q(Grasshopper) and answer questions 4(a) to 4(e).
(a)(i) State the sex of specimen P.
(ii) Give one reason tor the answer in 4(a).
(b)(i) Name the habitats of each of specimens P and Q
(ii) State three adaptations each of specimens P and Q to their habitats.
(c)(i) State one observable structural differences between specimens
(ii) State three observable structural similarities between P and Q.
(d)(i) Observe the mouthpart of specimen Q and state its feeding mechanism.
(ii) List one food which specimen Q feeds on.
(e) Remove carefully one of the legs on the right side of the metathorax of specimen P. Make a drawing, 6 cm to 8 cm long of the removed leg and label fully.
Answer Details
4(a)
(i) Specimen P is a male cockroach.
(ii) It has a pair of anal styles at the posterior end of the abdomen.
4(b)
(i) Habitats
- Specimen P (cockroach): Dark, damp places such as cupboards, kitchens, pit latrines, wardrobes, soak-aways and cracks or crevices.
- Specimen Q (grasshopper): Grassland, gardens, farms and other vegetated areas.
(ii) Adaptations to habitat
| Specimen | Adaptations |
|---|---|
| P: Cockroach |
|
| Q: Grasshopper |
|
4(c)
(i) Specimen P has a dorsoventrally flattened body, whereas specimen Q has a more cylindrical body.
(ii) Structural similarities
- Both have bodies divided into head, thorax and abdomen.
- Both have three pairs of jointed legs and a pair of antennae.
- Both have compound eyes, a chitinous exoskeleton and biting-and-chewing mouthparts.
4(d)
(i) Specimen Q feeds by biting and chewing.
(ii) It feeds on grass or green foliage leaves.
4(e)
Drawing of the right metathoracic leg of specimen P (cockroach), drawn to a length of 6 to 8 cm
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