Biology Practical expo waec 2017

(1ai)
Division-angiosperm
Class-monocotyledon
(1aii)
-it has scattered vascular bundle of stem
-they have fibrous root system
-they posses parallel venation
(1b)
-B-it is reproductive part of A
-C-it is female part of A
-D-it is fruit of A
(1d) D is seed.
it is a monocotyledonous plant seed it originate from
from the ovule of the female flower/ovary.
The seed is made up of an outer testa and a inner
tegmen, the seed has only one cotyledon and the embryo consist of a plumule and the radicle.
(2ai)
Specimen E belong to Mammals
Specimen F belongs to Aves
(2aii) Four features of Specimen E
-Their bodies are covered with hairs
-They have two pair of limbs
-They have different sets of teeth
-Their bodies are bilaterally symmetrical
Four features of Specimen F -They have wings which are used for flight
-They have two pairs of limbs
-Their bodies are covered with feather's except the hind legs which are covered with scales
- They have beak which is used for feeding
(2aiii) Specimen E
- The hairs in their body helps them for homostatics
-The limbs helps them to survive in their habitat
-The teeth helps in feeding
Specimen F
-The wings are used for flight
-The beak are used for flight
-The scales are used to control temperature
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(2bi)
Specimen G into is phylum and class Phylum-->Arthropoda Class--> Insecta
(2bii)
-They have wings
-They have narrow waist
-They are sting-yellow
-They have black stripes
(2biii)
Specimen G habitat is Terrestrial
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(4ai.)
Specimen L ------- Terrestrial habitat
Specimen M ------ Terrestrial habitat
Specimen N -------Terrestrial habitat
II.
Specimen L --------- Photosynthesis/autotrophic.
Specimen M -------- Biting and chewing / heterotrophic
Specimen N --------Saprophytic
iii. Specimen L ----- They are green plants therefore they
are able to produce their own food through
photosynthesis.
Specimen M ----- They have maxilla and mandibles that
are adapted to bite and chew grasses.
(4bi.) They all lives in the same habitat and they depend on
each other to survive.
Freshly uprooted grass ----- grasshopper --------Mushroom
(ii.) sources of food for man.
reduction of crop yields.
(iii.) Using of insecticides.