2023 WAEC GCE Biology Essay & Objective Answers

BIOLOGY OBJ:
01-10: BADABABCCC
11-20: DCACCBDABA
21-30: CBAACADBCD
31-40: DACCABBDDA
41-50: AADBDACDDC

Completed ✅

*2023 WAEC GCE BIOLOGY ANSWERS*
*NUMBER ONE*
(a)
TABULATE

*-UNDER ORGANISMS IN INCREASING COMPLEXITY-*
(i) bacterium
(ii) Euglena
(iii) Amoeba
(iv) Hydra
(v) Tapeworm
(vi) Tilapia
(vii) snake

*-UNDER LEVEL OF ORGANIZATION-*

(i) unicellular
(ii) unicellular
(iii) unicellular
(iv) multicellular
(v) multicellular
(vi) multicellular(fish)
(vii) multicellular

(bi)

(PICK ANY FOUR)

(i) Efficient nutrient absorption.
(ii) Rapid reproduction through binary fission.
(iii) Adaptability to diverse environments.
(iv) Energy efficiency in basic life processes.
(v) Minimal resource requirements.
(vi) Quick response to environmental changes.
(vii) Greater surface-to-volume ratio for effective exchange.
(viii) Lower susceptibility to structural damage.

(bii)

(PICK ANY FOUR)
(i) Specialized organs for efficient functions.
(ii) Advanced sensory systems for perception.
(iii) Ability to perform complex tasks and problem-solving.
(iv) Adaptability to diverse environments and diets.
(v) Higher resistance to environmental stressors.
(vi) Enhanced mobility and versatility in movements.
(vii) Longevity and sophisticated immune systems.
(viii) Advanced communication and social interaction skills.

(2a)
Tabular form

-Adult X-
TWO FOOD NUTRIENTS
(i) vitamins
(ii) minerals

ONE END PRODUCT OF DIGESTION
(i) glucose

-Adult Y-
TWO FOOD NUTRIENTS
(i) carbohydrates
(ii) protein

ONE END PRODUCT OF DIGESTION
(i) amino acids.

(2bi)
Constipation is a condition characterized by infrequent bowel movements and difficulty passing stool.

(2bii)
Adult X, who had a meal of vegetables, is less likely to suffer from constipation.

(2biii)
(PUCK ANY ONE)
(i) Vegetables are high in fiber, which adds bulk to the stool and helps in regular bowel movements.
(ii) Vegetables are also high in water content, which helps soften the stool and makes it easier to pass.
(iii) The presence of vitamins and minerals in vegetables helps promote a healthy digestive system and proper bowel function.

(2c)
(PICK ANY THREE)
(i) White bread provides a quick source of energy due to its high carbohydrate content.
(ii) The fried egg provides protein, which helps in muscle growth and repair.
(iii) The combination of white bread and fried egg can provide a balance of essential nutrients for the body.
(iv) The meal can be filling and satisfying, helping to reduce hunger and provide satiety.

(2di)
(PICK ANY TWO)
(i) Inadequate intake of essential nutrients: People may not consume a balanced diet that provides all the necessary vitamins, minerals, and macronutrients.
(ii) Poor absorption of nutrients: Certain medical conditions or digestive disorders can impair the absorption of nutrients from food.
(iii) Increased nutrient needs: Certain life stages, such as pregnancy or lactation, as well as certain medical conditions, may require higher nutrient intake than usual, and if these needs are not met, malnutrition can occur.

(2dii)
(PICK ANY THREE)
(i) Stunted growth: Malnutrition can lead to a lack of essential nutrients needed for proper growth and development, resulting in reduced height and weight for age.
(ii) Weak immune system: Malnutrition weakens the immune system, making children more susceptible to infections and diseases.
(iii) Delayed cognitive development: Inadequate nutrition can affect the brain’s development, leading to learning difficulties and impaired cognitive function.
(iv) Lack of energy: Malnourished children may experience fatigue and lack of energy, affecting their overall physical and mental well-being.

Number 3

(4ai)
Iron

(4aii)
Vitamin K

(4aiii)
Hemophilia

(4b)
(PICK ANY THREE)
(i) Cucumber
(ii) Cabbage
(iii) Lettuce
(iv) Spinach
(v) Broccoli
(vi) Brussels sprouts

(4c)
(i) Blood typing and crossmatching
(ii) Compatibility testing for infectious diseases like hepatitis and HIV
(iii) Hemoglobin and hematocrit levels to assess the patient’s blood count

(4d)
(i) Blood group A and Blood group O
(ii) Blood group A and Blood group O

(4ei)
The genetic disorder named in Hemophilia is common in males because it is an X-linked recessive disorder. Males only have one X chromosome, so if they inherit the faulty gene on their X chromosome, they will manifest the disorder.

(4eii)
If she inherits an X chromosome with the hemophilia gene from both parents

(4eiii)
(i) Down syndrome
(ii) Cystic fibrosis.

Number 5