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BIOLOGY (OBJ & ESSAY) NECO GCE 2015 FREE EXPO ANSWERS


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Tuesday 17th Nov. 2015
BIOLOGY (OBJ & ESSAY )
2.00PM-4.30PM
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BIOLOGY OBJ:
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(1ai)
-Borgu Game Reserve
-Yankari Game Reserve

(1aii)
(i) Preservation of genetic variation within the species
(ii) Preservation of species with potential benefits to humans
(iii) Preservation of natural beauty

(1bi)
Germination is defined as the process which involves the gradual development of the embryo seed into seedling or young plant

(1bii)
-Epigeal germination
-Hypogeal germination

(1biii)
-Water or moisture
-Warmth or suitable temperature
-Enzymes
-Viable seeds


(1ci)
TABULATE
(i)
-Hormonal is a chemical reaction.
-Nervous coordination is an electrical reaction

(ii)
-Hormonal co-ordination is slower.
-Nervous co-ordination is faster

(iii)
-Homonal has longer life span
-Nervous has shorter life span

(1cii)
-Prophase
-Metaphase
-Anaphase
-Telophase



5ai)
ecosystem refers to a community of plants and animals fucntioning together with their non-living environment.

5aii)
-Disruption to transport
-death of peple and animal
-degredation of environment
-ecomonic and commercial loss
-damage to cultural or heritage sites

5aiii)
-Stay in well-screened areas at night
-Always use a bed-net treated with insecticides.
-Use mosquito repellent.
-Seek immediate medical advice if you have the symptoms.

5bi)
TABULATE
:
i )
- Aerobic require the use of oxygen
to
occur
- Anaerobi does not requires use of
oxygen


ii)
- Aerobic is faster in operation

- Anaerobic is slow in operation


iii) - Aerobic occurs in higher animals

- Anaerobic occurs in micro
organisms


iv )
- Aerobic occurs in the
mitochondrion
- Anaerobic occurs in the cytoplasm


5bii )
- It posses light weight bones

- Their bones are made up of air
space

- They posses gills for respiration
- They posses fins for movement

- They posses scales for protection
against
mechanical injuries



3ai)
Gene: This is the hereditary unit which posses traits and characteristics that are transferred from parent to offspring

3aii)
Implantation: This is the process by which male gametes is injected into the ovarian follicle of the female sex organ

3aiii)
Species: This is a group of organisms that are related in certain characteristics that can make them interbreed freely among themselves

3aiv)
Saprophytes: They are organisms that rely on decaying organic matter as their nutrients

3bi)
-The mammalian skeleton gives shape to the animal
-It protects the delicate parts of the body
-It gives room for production of blood cells ie in the bone marrow

3bii)
Biceps and Triceps

3biii)
Amylase-Degrades carbonhydrate(starch) to maltose
Maltase-Degrades maltose into glucose
Sucrose-Degrades sucrose into glucose and fructose


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