Nabteb Gce 2016/2017 Biology Practical Free Questions And Answers

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1ai)
-Angiosperm
-Gymnosperm
ii) bacteria cell have cell wall, a cell membrane while viral cells does not have cell structure
iii) monohybrid cross involves the crossing of two pure traits while dihybrid involves the crossing of plants with two pairs of contrast characters.
iv) in open door, vessel leads out from the heart and in blood space while in closed door is always confined within cavities of the vessel.
v)Inhalation- this is the breathing in of air or oxygen into the respiratory organs such as lungs,gills.
Exhalation- this is the breathing out of carbon-dioxide and water vapour into the atmosphere
vi)-reduced resistance to disease
-night blindness
vii)-height
-weight
viii)-Light
-pH
ix)
-food content of fruit
-size or weight of food
x)placenta
xi)-Lion
-Sundew
xii)
-Community: this is the group of organisms that live together in the same location and interact with each other
-Ecosystem: is a basic functioning unit in nature. It is made up of living and their non-living environment
xiii)
-epigeal germination
-hypogeal germination
xiv)
-animal bites
-blood contact
xv)
-morphological variation
-physiological variation
=============
2a)
– Fig A- transverse section of a dicetyledonous root
– Fig B- transverse section of a monocetyledonous stem
2aii)
Fig A
– presence of root hair
-presence of piliferous layer
Fig B
– Presence of epidemis
– Presence of large inner vascular bundle
iii) Fig A- Sunflower
Fig B- Maize
iv)
-to store food
-for the conduction of water and mineral salts
-absorption of water and dissolved mineral salts from the soil to the leaves
v)
-cotex
-root hair
-xylem
-phloem
-piliferous layer
-epidermis
2b)
ii) it shrinks
ii) it burst away
2c)
-yam tubers
-paw paw
=============
3ai)
C- plant cell
D- animal cell
3aii)
C- it has a large vacuole
D- it has little or no vacuole
3bi)
C- it has a large vacuole, D- it has little vacuole. C- it has nucleus at the edge of the cytoplasm, D- it has nucleus at the centre of the cytoplasm
3bii)
-both have nucleus
-both have cell membrane
-both have endoplasmic reticulum
3biii)
-endoplasmic reticulum
-cell membrane
-cell wall
-vacuole
3ci) it aids the transport of materials within cytoplasm
3cii)it provides shape, support and mechanical support of the cell
=============
4i) food web
ii)
-mosquito larvae
-aquatic plant
-cray fish
-tadpole
-fish
-fowl
-man
-earthworm
-snail
-tree
iii) X(tree)
iv) I(mosquito larvae)
v) trees
vi) V, VI, X will be reduced
4c)
-light
-negativity phototropic
-negatively geotropic
-positively geotropic
-positively hydrotropic
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Chinonso Ibeh

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