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2019/2020 WAEC GCE BIOLOGY PRACTICAL EXPO QUESTIONS AND ANSWERS
WAEC GCE BIOLOGY PRACTICAL ANSWER
(2a)
I – Queen
II -Soldier
III – Male (king)
IV – Worker
V – Nasute
(2aii)
I – Lay eggs and produce the young
II – Defend the territory
III – Mate with the queen
IV – Search for foods and feed the colony
V – Clean the territory or the colony
(2aiii)
I – Queen : possession of eggs
II – Possession of power mandible
V – Possession of strongly built walking legs
(2bi)
Social behavior adaptation
(2bii)
Works or duties are shared among the castes
(2biii)
Bees
(2c)
– Cause decomposition of materials eg wood
– Serves as food
– Promotes nutrients availability in the soil
(2d)
Tabular Form;
Under I
(i)it has small head
(ii) the abdomen is large and
(iii)it has no walking legs
Under II
(i)it has big head
(ii)the abdomen is small
(iii)it has walking legs
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(1a)
Eating
Blowing
Drinking
(1aii)
X
! Hand
! Mouth
! Tongue
Y
! Hand
! Mouth
! Tongue
(1c)
(i) It lubricates the joints
Cartilage, found in joints and the disks of the spine,
contains around 80 percent water. Long-term dehydration
can reduce the joints’ shock-absorbing ability, leading to
joint pain.
(ii) It forms saliva and mucus
Saliva helps us digest our food and keeps the mouth, nose,
and eyes moist. This prevents friction and damage. Drinking
water also keeps the mouth clean. Consumed instead of
sweetened beverages, it can also reduce tooth decay.
(iii) It delivers oxygen throughout the body
Blood is more than 90 percent water, and blood carries
oxygen to different parts of the body.
(iv) It boosts skin health and beauty
With dehydration, the skin can become more vulnerable to
skin disorders and premature wrinkling
(4ai)
Pollination
(4aii)
I. Self pollination
II. Self pollination
III. cross pollination
(4aiii)
I. Transfer of pollen grain from the anther of one flower for the stigma of the same flower
II. Transfer of pollen grains from the anther of one flower to the stigma of another flower on the same plant
III. Transfer of pollen grains from the anther of a flower to the stigma of another flower on a different plant of the species
(4bi)
(i) Sexual reproduction
(4bii)
(i) Flowers have reproductive organs
(ii) It involves the production of gametes
(4c)
(i) Produces healthier seeds
(ii) Plants produced from III are more likely to survive changes in environmental conditions
(iii) It leads to greater variations among species and a faster rate of evolution
(4d)
(i)butterfly (insect)
(ii)birds (aves)
(iii)man (mammals)
(iv)bat
(4e)
It will lead the formation of a new hybrid
(4f)
(i)the pollens are rough and sticky
(ii)the stigma is flat with sticky surface to recures the pollens
(iii)the way the petals are arranged
(iv)maturation of stamens and stigmas
(4g)
(i)the plants have large conscious petals and sepal
(ii)the flower are brightly colored
(iii)the flower possess scent
(iv)the flower have nectar.
(4gii)
(i)bees
(ii)butterflies
(4h)
(i)androecium
(ii)gynoecium
(iii)stigma
Categories: Waec Gce
ABUGUJAH UCHENNA
by Anonymous on Jan 31, 2020