BIOLOGY PRACTICAL ANSWERS

1a)
i)Onion bulb
ii)Bulb
iii)It has a swollen stem
iv)
I-Membraneous leaves
II-Outer scaly leaves
III-Thick fleshy storage leaves
IV-Auxillary buds
V-stem
VI-Roots
v)It is stored in the fleshy leaves
vi)
II-It protect the inner leaves
III-It stores food for the plant
VI-It absorbs nutrients from the soil

(1b)
i)Epicarp
ii)Mesocarp
iii)Endocarp
iv)Hollow containig water
i-protects the seed and makes fruit to float on water
ii-makes the fruit to be bouyant in water during dispersal
*Fleshy drupe
-It is fleshy
-It consists of epicarp,mesocarp and endocarp ie thin epicarp,fibrous mesocarp
*Palm nut,mango
*water,man
vii)
-It is used as food for man
-It is used as an ornament plant
It is used for making oil
-The fibrous mesocarp is used for cooking
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2a)
i)arthropodia
ii) inserta

2b)
i) For Phyllum
– presence of jointed appenodafes
-presence of chitinumes
ii) for class
– presence of 3 pairs of walking legs
– presence of segmented body parts

2c)
i) Organism D is male
ii) presence of airal style

2d)
i)D has anal style while G does not
ii) the terminal end of G abodomen is modified into a boat-like structure
iii) D has longer antennae

2e)
i) D has wings for flight and escape
ii) F is smaller and could hide easily in crevices

2f)
i)colour of
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4ai)
i) foilage
ii) epicotyl
iii) tap root
iv) rootlets
v) split testa
vi) radicle
vii) cotyledon
4aii)
i) it is the primitive leaf wich which manufactures food for the seeding
ii) it functions as the primitive sterm of the seedling
v) it protects the inner part of the seed before germination
v) it absorbs natrients from the soil
vii) it provides food for the germination seed.
Vi) it grows to form the root of the seeding
4bi)
Epigeal germination
4bii)
– cowpea
– groundnut
– castor
4biii)
– the seed requires warmth, water, viable seeds for germinitaion
-the seed absorbs moisture and become swollen
-The seed splits ,the radicle grows to form the root while the plumule form the shoot

4ci)
It is carried above the soil level as a result of elongation of the epicotyl
4cii)
Cotyledon
4ciii)
Carbonhydrate

4d)
-Viable seeds
-Warmth
-Moisture
-Enzymes

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