WAEC GCE 2024 Biology (Essay & Obj) Answers -Jan/Feb Expo

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BIOLOGY-OBJ
01-10: CBBCEECABA
11-20: DADCCCACED
21-30: CACAACCDBC
31-40: AEECDBBACD
41-50: EBEBCBBCAC
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WAEC GCE 2024 BIOLOGY ANSWERS-Examking.net

(3ai)

(i)Heavy metals (e.g., lead, mercury)

(ii)Industrial chemicals

(iii)Nutrient pollutants (e.g., nitrogen, phosphorus)

(iv)Pathogens (e.g., bacteria, viruses)

(3aii)

(i)Particulate matter (PM)

(ii)Nitrogen dioxide (NO2)

(3bi)

(i)Respiratory problems (e.g., asthma, bronchitis)

(ii)Cardiovascular diseases

(iii)Damage to the ozone layer

(iv)Adverse effects on wildlife and ecosystems

(3bii)

(i)Emissions from vehicles (e.g., cars, trucks)

(ii)Industrial activities and emissions

(iii)Agricultural practices (e.g., burning of crop residues)

(iv)Deforestation and biomass burning

(3c)

(i)Water pollution:

(i)Implementing stricter regulations and enforcement for industrial discharge and wastewater treatment

(ii)Promoting sustainable agricultural practices to minimize chemical runoff into water bodies

(ii) Industrial pollution:

(i) Investing in cleaner production technologies and processes to reduce emissions and waste generation

(ii) Implementing recycling and reuse programs to minimize the generation of industrial waste and pollutants.

(3d)

Reducing refers to the process of adding electrons or hydrogen ions to a molecule, resulting in a decrease in the oxidation state of the molecule.

(4a) Population dominance refers to the condition where one or a few species within an ecosystem have a significantly higher abundance or biomass compared to others, exerting a substantial influence on the ecosystem dynamics.

 

(4b)

(4bi) Primary production in an ecosystem refers to the synthesis of organic compounds by autotrophic organisms, mainly plants, through photosynthesis.

 

(4bii) The primary source of energy in an ecosystem is sunlight, which is captured by autotrophic organisms during photosynthesis and then transferred through the food web.

 

(4biii) 

PICK ANY THREE

(1) Photosynthesis: Carbon is a key element in the formation of organic compounds during photosynthesis.

(2) Respiration: Carbon is released during the process of respiration, providing energy for living organisms.

(3) Biomolecules: Carbon is a fundamental building block of essential biomolecules such as carbohydrates, proteins, lipids, and nucleic acids.

(4) Carbon Cycle: Carbon plays a crucial role in the global carbon cycle, cycling between the atmosphere, oceans, soil, and living organisms.

(5) Climate Regulation: Carbon dioxide, a form of carbon, contributes to the greenhouse effect, regulating Earth’s temperature and climate.
Waec GCE 2024 Biology (Essay &Obj) Questions And Answers

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Waec GCE 2024 Biology (Essay &Obj)

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WAEC GCE Biology (Essay &Obj)

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Waec GCE 2024 Biology (Essay &Obj)

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