for University and Jamb entry examination in West Africa countries.
In a year, over three million candidates registered for the exams coordinated by WAEC
The West African Examination Council, WAEC, August/ September Gce Biology exam paper will be written on Tuesday, 4th September, 2018.
The Biology 2 (Essay) paper will start by 09:30am and will last for 1hr 40mins while the biology 1
(Objective) exam will commence 11.10am and will last for 50mins.
In this situation, we will be posting out samples of the waec biology
Questions for candidates that will partake in the examination from past questions.
Keep accessing this page as update will be made in a instantaneous
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1a) Plants take in some compounds like carbon dioxide through their leaves.
They absorb some other materials such as compounds of nitrogen, phosphorus, etc.,
from the soil through their roots.
The transport system consists of tube like passages made up of vascular tissue.
There are two types of vascular tissues in plants—xylem and phloem.
The vascular system extends from the roots through the stem and continues up to the leaves.
In the leaves it is clearly seen as a pattern of veins.
Water and minerals are transported from the roots upwards through the xylem tubes.
2a) Enzyme is a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
2a(i) all enzymes are proteins.
(Ii ) Enzymes possess great catalytic power.
(iii) Enzymes are highly specific
(iv) Enzymes show varying degree of specificities.
(v) Absolute specificity where the enzyme react specifically with only one substrate.
2b) pancreatic fluid or juice contains digestive enzymes that pass to the small intestine where they help to further
Break down the carbohydrates, proteins,
And lipids (fats) in the chyme. Pancreatic
Juice is a liquid secreted by the pancreas,
Which contains a variety of enzymes?
Including trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, pancreatic lipase, nucleases, and andamylase.
Pancreatic juice is alkaline in nature due to the high concentration of bicarbonate ions. This is
useful in neutralizing the acidic gastric acid, allowing for effective enzymic action.
(2c) most importantly, sun provides vitamin D which helps the body absorb the minerals calcium and phosphorus from the food that the boy eat,
which is important for bone health. While milk is the main source of
dietary calcium. Calcium is a major bone mineral, mandatory for bone health.
2d) (i) Photosynthesis conducted by plants is also an important part of the carbon cycle.
(ii) It releases oxygen needed for breathing
(iii) It serves as source of food manufacturing for human rights
(iv) It provides sources for fuel through plants
(v)it help to balance the ecosystem
Q.3. Microoganism
light
Water pressure,
currents,
temperature
6a)(i) mimicry is a similarity of one species to another that protects one or both.
An example of this is the cuckoo bee.
(ii) Camouflage is the structural adaption that enables specie s to blend with theirSurroundings;
allows a species to avoid Detection by predators.
6b)(i) Their legs are adapted for running
(ii) They adapts the leathery forewings asTemina to provide a protective cover for the second set of wings.
(iii) They evolved mandibles to bite and chew solid food.
6c)(i) It reduces the quality and quantity of the crops
(ii)it reduces their productivity
6d)(I) by refrigerating
(Ii) By saltin
(iii) By drying]
(iv) By the use of silos
6e)(i) in medicin