2016 Waec gce Biology practical Expo

1a)
i)Onion bulb


ii)Bulb


iii)It has a swollen shoot 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


2a)
i)Arthropoda

ii)Insecta


2b)
i)For phylum:

-Presence of jointed appendages

-Presence of chitinous exoskeleton

ii)For class


-Presence of three pairs of walking legs


-Presence of segemented body parts


2c)

i)Organism D is male

ii)Presence of anal style


2d)

i)D has anal style while G does not


ii)The terminal end of G's abdomen is modified into a boat like structure for carrying egg case


iii)D has larger antennae

2e)
i)D has wings for flight and escape production


ii)F is smaller and could hide easily in crevices


2f)
i)colour of


4ai)
I-Foilage leaf
II-Epicetyl
III-Tap root
Iv-Routlets
V-Split testa
VI-Radicle
VII-Cotyledon


4aii)
I-It is the primitive leaf which manufactures food for the seedling


II-It functions as the primitive stem for seedling


V-It protect the inner parts of the seedling before germination


IV-It absorbs nutrients from the soil


VII-It provides food for germination


VI-It grows to form the root of the seedling


4bi)
Epigeal germination


4bii)
Cowpea,groundnut,castor


4biii)
-The seed requires warmth,water,viable seeds etc for germiation
-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


Good luck to you all