Study specimens L and M and answer questions (a) to (e).
(ii) Name three other classes of the phylum to which specimen L belongs.
(i) State two ways each by which specimens L and M are of economic importance. L: _______ M: ________
(ii) State five ways by which specimen L can be controlled.
(d)(i) State five observable differences between specimens L and M.
(ii) State four observable similarities between specimens L and M.
(e) Name one habitat each of specimens L and M. L:_______ M:_______
(i) Class
L: Phylum
M: Arthropoda
(ii) Class:
L: insecta
M: insecta
(b) i) Observable Features of Members of the Class of Specimen L:
- Three body divisions: head, thorax, abdomen
- Three pairs of jointed walking legs
- Presence of wings
- A pair of jointed antennae
- Spiracles present
- A pair of compound eyes
- Exoskeleton of chitin/chitinous exoskeleton.
(ii) Other classes of phylum of specimen
L: Crustacea-Chilopoda-Diplopoda-Arachnida.
(c) Economic Importance of Specimen:
(i) L
- Vector/transmits diseases
- Buzzing noise disturbs(sleep)
- Causes discomfort through its bites.
M:
- Has aesthetic value/used as ornament,
- Pollinates flowers
- Destroys (citrus) fruits by feeding on them
(ii) Ways by which Specimen L/Mosquito can be Controlled
- Sleeping under nets (to prevent adult mosquito bites)
- Clearing the bushes around the house ( to eliminate places where mosquitoes hide and breed)
- Removing all stagnant water bodies around the house ( to prevent mosquitoes from breeding)
- Using/spraying insecticides in the rooms/around the house (to kill adult mosquitos)
- Pouring oil on stagnant water bodies (to suffocate the larvae),-Introducing fish/bacteria, e.g. Bacillus species into water bodies (to eat up mosquito larvae and pupae)
- Using mosquito repellents(to prevent adult mosquitos from biting)
- Using light to attract and kill adult mosquitoes/use of mosquito trap
- Using genetically modified mosquitoes to result in early death of larvae/eggs that do not hatch.
(d)
(i) Observable differences between specimens L and M
(ii) Similarities between specimens L and M: Both have:
- Three body divisions/head, thorax and abdomen-proboscis;
- Wings: Six legs/three pairs of legs:- one pair of compound eyes; - One pair of antennae
- Exoskeleton of chitin chitinous exoskeleton;
- Segmented abdomens - three thoracic segments.
(c) Habitat of specimens L and M: L: Houses/land/swamp/marshy areas/ dark places/tall grasses/ pond(s) M: Garden/on trees/leaves/flowers/rock surfaces/bare ground/grassland
