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WAEC GCE 2018 Biology Obj And Essay Answer – Jan/Feb Expo

WAEC GCE Biology Obj And Essay/Theory Solution Questions and Answer – NOV/DEC 2018 Expo Runz.


Biology-Obj
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41AB. Do the rest urself


5a)
Evaporation
Condensation
Precipitation
Collection
Transportation


i)PH is pH meter
ii)Light intensity is photometer
iii)Turbidity is nephelometer or turbidimeter,
5b)Glucose
I. Glucose is the main energy source for body cells.
Ii. glucose plays a
structural role with its inclusion in carbohydrate additions to proteins.
ii) Oxygen
I. To burn food for the release of energy stored
Ii. For cellular respiration
5c) Nastism are nastic movements which are non-directional responses to stimuli (e.g. temperature, humidity, light irradiance), and
are usually associated with plants.

(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]
=========
3a)
An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

(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
=============

4a)
Mendel's 1st 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 ant change

4aii)
i)It can be use in correcting diseases or with order
ii)it can be used in agricultural to enhanced crop use
iii)it can be used to complained two close species to get a unique high bird
iv)it can be use to determine the cause of a disease and choice a treatment
v)it can be used in a wide range of plant,animals and micro organisms

4aiii)
i)death
ii)radiation
iii)mental

4b)
Evolution is change in the heritable characteristics of biological populations over successive generations

4bi
1. the process by which different kinds of living organism are believed to have developed from earlier forms during the history of the earth.
2. the gradual development of something.
3. the giving off of a gaseous product, or of heat.
4. a pattern of movements or manoeuvres.
5. the extraction of a root from a given quantity..




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