TEST OF PRACTICAL KNOWLEDGE QUESTION Study specimens L and M and answer questions (a) to (e). (a) Classify each of specimens L and M into its: (i) Phylum L:...
Study specimens L and M and answer questions (a) to (e).
(a) Classify each of specimens L and M into its:
(i) Phylum L: ________ M: _______
(ii) Class L:_______ M:_______
(b)
(i) State three observable features of members of the class of specimen L.
(ii) Name three other classes of the phylum to which specimen L belongs.
(c)
(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:_______
(a) Classification
Specimen L (mosquito)
Specimen M (butterfly)
(i) Phylum
Arthropoda
Arthropoda
(ii) Class
Insecta
Insecta
(b)(i) Three observable features of the class Insecta: body divided into head, thorax and abdomen; three pairs of jointed walking legs; a pair of jointed antennae (also wings, compound eyes and a chitinous exoskeleton).
(b)(ii) Three other classes of Phylum Arthropoda: Crustacea, Arachnida and Chilopoda (or Diplopoda).
(c)(i) Two ways each is of economic importance
L (mosquito): it is a vector that transmits diseases such as malaria, and its bites cause discomfort and disturb rest.
M (butterfly): it pollinates flowers and has aesthetic (ornamental) value, though its larvae destroy crops such as citrus by feeding on them.
(c)(ii) Five ways specimen L (mosquito) can be controlled
Removing all stagnant water around the house to prevent breeding.
Pouring oil on stagnant water to suffocate the larvae and pupae.
Spraying insecticides in and around the rooms to kill adult mosquitoes.
Clearing bushes around the house to remove hiding and breeding places.
Sleeping under treated mosquito nets to prevent bites.
(d)(i) Five observable differences between specimens L and M
Specimen L (mosquito)
Specimen M (butterfly)
Small, slender body
Larger, broader body
One pair of narrow, transparent wings
Two pairs of broad wings covered with coloured scales
Dull greyish colour
Brightly coloured, patterned
Feathery (plumose) antennae
Clubbed antennae
Proboscis is slender and piercing
Proboscis is long and coiled for sucking nectar
(d)(ii) Four observable similarities between L and M: both have the body in three divisions (head, thorax and abdomen); both have three pairs of legs and one pair of antennae; both possess wings and a pair of compound eyes; both have a chitinous exoskeleton and a proboscis for feeding.
(e) One habitat each: L (mosquito): damp, dark places near stagnant water. M (butterfly): gardens and grassland among flowering plants.
(b)(i) Three observable features of the class Insecta: body divided into head, thorax and abdomen; three pairs of jointed walking legs; a pair of jointed antennae (also wings, compound eyes and a chitinous exoskeleton).
(b)(ii) Three other classes of Phylum Arthropoda: Crustacea, Arachnida and Chilopoda (or Diplopoda).
(c)(i) Two ways each is of economic importance
L (mosquito): it is a vector that transmits diseases such as malaria, and its bites cause discomfort and disturb rest.
M (butterfly): it pollinates flowers and has aesthetic (ornamental) value, though its larvae destroy crops such as citrus by feeding on them.
(c)(ii) Five ways specimen L (mosquito) can be controlled
Removing all stagnant water around the house to prevent breeding.
Pouring oil on stagnant water to suffocate the larvae and pupae.
Spraying insecticides in and around the rooms to kill adult mosquitoes.
Clearing bushes around the house to remove hiding and breeding places.
Sleeping under treated mosquito nets to prevent bites.
(d)(i) Five observable differences between specimens L and M
Specimen L (mosquito)
Specimen M (butterfly)
Small, slender body
Larger, broader body
One pair of narrow, transparent wings
Two pairs of broad wings covered with coloured scales
Dull greyish colour
Brightly coloured, patterned
Feathery (plumose) antennae
Clubbed antennae
Proboscis is slender and piercing
Proboscis is long and coiled for sucking nectar
(d)(ii) Four observable similarities between L and M: both have the body in three divisions (head, thorax and abdomen); both have three pairs of legs and one pair of antennae; both possess wings and a pair of compound eyes; both have a chitinous exoskeleton and a proboscis for feeding.
(e) One habitat each: L (mosquito): damp, dark places near stagnant water. M (butterfly): gardens and grassland among flowering plants.
