How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
Which of the following factors primarily affects the distribution of organisms in an ecosystem?
Wind speed
Soil pH
Temperature
Day length
Correct answer is C
Temperature primarily affects the distribution of organisms in an ecosystem. Temperature is a crucial factor that influences the survival, growth, and reproductive capabilities of organisms. Different species have specific temperature requirements and tolerance ranges.
Which of the following describes the inheritance of traits from parents to offspring
Evolution
Adaptation
Genetics
Natural selection
Correct answer is C
Genetics is the field of biology that studies the inheritance of traits from parents to offspring. Genetics encompasses various concepts and principles, including the study of genes, DNA, chromosomes, genetic inheritance patterns, genetic mutations, and genetic variations.
Which of the following blood vessels carries oxygenated blood away from the heart?
Arteries
Venules
Capillaries
Veins
Correct answer is A
Arteries are blood vessels that carry oxygenated blood away from the heart to various parts of the body.
Organs, tissues, cells, organisms, populations, communities, ecosystems
Cells, organs, tissues, organisms, populations, communities, ecosystems
Tissues, organs, cells, organisms, populations, communities, ecosystems
Cells, tissues, organs, organisms, populations, communities, ecosystems
Correct answer is D
The correct hierarchical organization of life from the smallest to the largest scale is as follows: cells, tissues, organs, organisms, populations, communities, ecosystems.
Which of the following is an example of conserving resources in an ecosystem?
Excessive use of chemical fertilizers in agriculture
Introducing invasive species to an ecosystem
Implementing sustainable fishing practices
Cutting down trees for timber production
Correct answer is C
Implementing sustainable fishing practices is an example of conserving resources in an ecosystem. It identifies a practice that helps in preserving and maintaining the fish populations and the overall health of aquatic ecosystems.
Which of the following characteristics is typical of the phylum Arthropoda?
Radial symmetry
Closed circulatory system
Endoskeleton made of bones
Presence of a segmented body
Correct answer is D
Arthropods are characterized by the presence of a segmented body. This is a key characteristic of the phylum Arthropoda, which includes insects, spiders, and crustaceans. The other options are incorrect. Arthropods do not exhibit radial symmetry, they have an open circulatory system, and their exoskeleton is made of chitin, not bones.
Which organs are part of the alimentary canal in the human digestive system?
Salivary glands, tongue, and pharynx
Large intestine, appendix, and rectum
Stomach, liver, and gallbladder
Oesophagus, pancreas, and small intestine
Correct answer is D
The alimentary canal, also known as the gastrointestinal tract, is a long, continuous tube that extends from the mouth to the anus. It is responsible for the digestion and absorption of nutrients.
Oesophagus: The esophagus is a muscular tube that connects the mouth to the stomach.
Pancreas: The pancreas is both an endocrine and exocrine gland. From the digestive system perspective, it plays an important role in producing and secreting digestive enzymes into the small intestine.
Small intestine: The small intestine is the longest part of the alimentary canal and is divided into three sections: duodenum, jejunum, and ileum.
The alternate form of a gene is
Alternate type
Dominant character
Recessive character
Allele
Correct answer is D
In genetics, an allele is one of two or more versions of a gene that are found at the same place on a chromosome. Alleles can come in different versions, with each version bringing about different phenotypic traits. For example, a gene for flower color may have one allele that produces red flowers and another allele that produces white flowers. Therefore, the alternate form of a gene is an allele.
What are the primary products of photosynthesis?
Carbon dioxide and water
Glucose and oxygen
Glucose and carbon dioxide
Oxygen and water
Correct answer is B
The primary products of photosynthesis are glucose and oxygen. During photosynthesis, plants use sunlight, water, and carbon dioxide to produce glucose, a simple sugar that serves as the main source of energy for the plant. Oxygen is also produced as a byproduct of photosynthesis and is released into the atmosphere.
Which component of blood is responsible for carrying oxygen to the body tissues?
Platelets
White blood cells
Red blood cells
Plasma
Correct answer is C
Red blood cells, also known as erythrocytes, are responsible for carrying oxygen to the body tissues. They contain a protein called hemoglobin, which binds to oxygen in the lungs and transports it to other parts of the body.
Video Editor at Abakon Integrated Services Limited
Health, Safety, and Environment (HSE) Officer at Whassan Nigeria Limited
Record Management Officer at Medecins Sans Frontieres (MSF)
Packaging Machine Operator - Golden Pasta at Flour Mills of Nigeria Plc
Factory Accountant at Dufil Prima Foods Plc
Emergency Medical Technician - Paramedic Trainer at International NGO Safety Organisation (INSO)
CNC Operator at African Steel Mills (Nigeria) Limited
Sales Manager at SalesPlat Technologies