WELCOME TO EXAMDUBS.COM.NG ANSWER PAGE FOR WAEC 2023
___________________________________________
CLICK HERE TO REFRESH EVERY 2 MINUTES
___________________________________________
WAEC BIOLOGY ANSWER PAGE 2023
==================================
WAEC BIOLOGY OBJ ANSWERS
01-10: CABADCCBCD
11-20: DBCDDBDBBC
21-30: ADABDAADCD
31-40: BBCBDCBBBA
41-50: ABCCBCACDA
COMPLETED
==================================
WAEC BIOLOGY THEORY ANSWERS 2023
==================================
Q1
==========================
(2a)
[FILL IN THE TABLE WITH THIS]
IRON:
Function:
(PICK ANY ONE)
-Chlorophyll formation
-Electron transport in photosynthesis
-Enzyme activation
-Nitrogen fixation
Effects of deficiency in plants:
(PICK ANY ONE)
-Chlorosis (yellowing of leaves)
-Stunted growth
-Reduced fruit and seed production
-Interference with nutrient uptake
MOLYBDENUM:
Function:
(PICK ANY ONE)
-Nitrogen fixation
-Enzymatic reactions
-Iron uptake and utilization
-Seed germination and growth
-Chlorophyll formation
Effects of deficiency in plants:
(PICK ANY ONE)
-Reduced nitrogen fixation
-Chlorosis (yellowing of leaves)
-Impaired sulfur metabolism
-Abnormal phosphorus uptake
-Altered enzyme activity
POTASSIUM
Function:
(PICK ANY ONE)
-Osmotic regulation
-Enzyme activation
-Protein synthesis
Effects of deficiency in plants:
(PICK ANY ONE)
-Stunted growth.
-Leaf chlorosis.
-Weak stems.
-Reduced flower and fruit production.
-Increased susceptibility to diseases and pests.
COPPER
Function:
(PICK ANY ONE)
-It plays a vital role in activating various enzymes within plants
-It helps to facilitate photosynthesis
-It helps facilitate respiration in plants
(PICK ANY ONE)
Effects of deficiency in plants:
-Stunted growth
-Yellowing of leaves
-Death of plant tissue
-Reduced fertility
-Increased susceptibility to diseases
NITROGEN
Function:
(PICK ANY ONE)
-It helps in building proteins
-It is a fundamental constituent of nucleic acids and DNA
-It helps in formation of chlorophyll
-It helps in energy transfer and metabolism
-It is an enzyme co-factor
Effects of deficiency in plants:
(PICK ANY ONE)
-Reduced photosynthesis
-Poor protein synthesis
-Leaf necrosis
-Increased susceptibility to diseases and pests.
-Impaired nutrient transport
(2b)
(PICK ANY THREE)
(i) Fruits and Vegetables
(ii) Grains and Cereals
(iii) Legumes and Pulses
(iv) Nuts and Seeds
(v) Dairy Products
(vi) Meat, Poultry, and Fish
(2ci)
BUCCAL CAVITY:
(PICK ANY TWO)
(i) The buccal cavity is the entry point for food and liquids into the digestive system.
(ii) The buccal cavity is responsible for chewing or masticating food.
(iii) The buccal cavity contains salivary glands that produce saliva.
(iv) The buccal cavity plays a vital role in speech production.
(2cii)
DUODENUM
(PICK ANY TWO)
(i) The duodenum receives partially digested food from the stomach and continues the process of digestion.
(ii) The duodenum is involved in the absorption of nutrients from digested food.
(iii) The duodenum plays a role in regulating the overall process of digestion.
(iv) The duodenum secretes several important hormones that regulate various aspects of digestion.
(2ciii)
STOMACH
(PICK ANY TWO)
(i) One of the primary roles of the stomach is to store food temporarily after it has been ingested.
(ii) The stomach aids in the mechanical digestion of food through muscular contractions known as peristalsis.
(iii) The stomach secretes gastric juices, primarily composed of (HCl) and enzymes such as pepsin, which play a crucial role in chemical digestion.
(iv) The stomach controls the rate at which food is released into the small intestine.
(2d)
Glucose and fructose
===================================
(3a)
I: Saprophytism
II: Commensalism
III: Mutualism
IV: Predation
V: Parasitism
(3b)
(i) B: Prey
(ii) G: Predator
(3c)
B: Rabbit
C: Vultures
D: Lion
E: Remora fish
F: Cleaner shrimp
G: Hyenas
H: Ticks
J: Dogs
(3di)
Mutualism
(3dii)
There is a mutual exchange of resources or protection that enhances the survival of both organisms.
(3ei)
(i) Saprophytic Fungi
(ii) Bacteria
(3eii)
Decomposers
=============================
Q4
===========================
Q5
====================================
BIOLOGY INSTRUCTIONS
ANSWER THREE QUESTIONS IN ALL: TWO QUESTIONS FROM SECTION A AND THE COMPULSORY QUESTION IN SECTION B.
==============================
SECTION A
ANSWER TWO QUESTIONS ONLY FROM THIS SECTION.
QUESTION 1
QUESTION 2
QUESTION 3
QUESTION 4
==============================
SECTION B
ANSWER THE QUESTIONS IN THIS SECTION.
QUESTION 5
==============================
COMPLETED
==============================
0 Comments