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2018/2019 Waec Gce Biology { Obj & Theory } Questions And Answers, Expo For January/ February Candidates.
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2018/2019 Waec Gce Biology { Obj & Theory } Questions And Answers, Expo For January/ February Candidates.

Posted on January 31, 2018 || Section: WAEC UPDATES


2018/2019 Waec Gce January/February real Biology Obj/Essay Questions/Answers Biology Obj/Essay/Theory Questions / Answers / expo / runs. 2018/2019 Waec gce January/February Biology Theory 2018/2019 Waec Gce Biology Obj/Essay Theory questions / answers 2018.

BIOLOGY OBJ:
1-10: BDBBACCAAA
11-20: ACAACCADAA
21-30: DBBDDDABBC
31-40: BABDDCBDCD
41-50: ABDACBCABD

============================================

(1ai)
GLUCOSE:
-Energy generation
-It helps in metabolism

(1aii)
OXYGEN:
-It helps to oxidize glucose
-it brings about cellular or tissue respiration

(1b)
(i) Aerobic
(ii) Anaerobic

(1c)
(i) Amoeba – Body surface
(ii) Tilapea – Gill
(iii) Adult toad – Lungs
(iv) Grasshopper – Tracheae

(1d)
DRAW THE DIAGRAM OF OPEN STOMA IN A LEAF AND LABEL[6cm – 8cm long]

==============================================

(3ai)
Ecosystem is a system that includes all living organisms (biotic factors) in an area as well as its physical environment (abiotic factors) functioning together as a unit.

(3aii)
Abiotic environment are all physical and nonliving chemical factors, such as soil, water, and atmosphere, which influence living organisms.

(3bi)
-Temperature
-Salinity
-Flow.

(3bii)
-Altitude
-Humidity
-Temperature

(3c)
In a simple ecosystem that consists of rabbits and grass. The grass reproduces at a certain rate, and the rabbits randomly wander around the world eating the grass. If a rabbit stumbles across a patch of grass, they will eat it and gain energy. If a rabbit gains enough energy, they will reproduce. Conversely, if a rabbit wanders around too long without finding any grass to eat, they will die.

(3d) DRAW THE PYRAMID

============================================

(4ai)
Mendel’s law of inheritance states that genes are responsible for the development of the individual and that they are independently transmitted from one generation to another without undergoing any change.

(4aii)
-In production of drugs
-In production of organisms that are resistance to diseases
-In idetification of paternity of a child
-In identification of human blood types
-In studying of human genotypes

(4aiii)
-Continuous inbreeding reduces productivity and fertility of the animals
-Inbreeding increases homozygosity
-Inbreeding to an ancestor increases the risk of inheriting any undesirable characteristics it carried.

(4bi)
Evolution is change in the heritable characteristics of biological populations over successive generations.

4bii)

Convergent evolution occurs when species have different ancestral origins but have developed similar
features.

WHILE

Divergent evolution occurs when two separate species evolve differently from a common ancestor.

============================================

(5a)
Evaporation
Condensation
Precipitation
Collection
Transportation


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