UI POSTUTME biology past questions and answers

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University of Ibadan Biology past questions and answers.

I posted this for you to be able to access the UI PQ questions online, please make sure you mastered the answers very and also contribute in the comment section below.

This UI biology past questions is only there to put students through on how the questions may be structure, it not always possible that the exact questions will appear in the upcoming POSTUTME exams.

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UI BIOLOGY PAST QUESTIONS AND ANSWERS

__ is an end product of digestion of fat. (A) Glucose (B) Fatty acid (C) Amino acid (D)
Fructose (E) Galactose
Ans: B
Asexual reproduction in Hydra sp. is commonly by __ (A) Binary fission (B) Fragmentation (C)
Budding (D) Separation (E) Regeneration
Ans C
Benedict’s solution is used to test for _ (A) Carbohydrate (B) Lipid (C) Protein (D) Vitamins (E) Minerals
Ans C
Pepsin is an enzyme that digests _ (A). Starch (B). Sugar (C). Lipid (D). Fat (E). Protein. Ans E
The breakdown of large organic molecules into smaller simpler soluble molecules is called –– (A)
Excretion (B) Digestion (C) Absorption (D) Reproduction (E) Ingestion
Ans B
The enzyme that curdles milk is_____________ (A). Pepsin (B). Ptyalin (C). Renin (D). Amylase
(E). Trypsin
Ans C
Which is the enzyme that begins digestion of starch in the mouth? (A) Ptyalin (B) Maltase (C)
Amylase (D) Sucrase (E) Lactase
Ans A
A group of interacting populations in a particular habitat can be described as _(A) biome (B)
biosphere (C) community (D) population ecosystem (E) environment.
Ans C
A habitat can be defined as _(A) a group of animals and plants living within a common
boundary. (B) a place in which plants and animals live. (C) a community living together in the
same place. (D) different areas, with a common animal and plant population. (E) None of the
above.
Ans B
A symbiotic relationship in which one organism is completely dependent on another organism is
called __ (A) Parasitism (B) Commensalisms (C) Mutualism (D) Saprophytism (E) Competition
Ans A
An association between two organisms where both members benefit is known as _ (A)
symbiosis. (B) commensalism. (C) ammensalism. (D) mutualism. (E) saprophytism.
Ans D
An instrument used in measuring the speed of wind is (A) a barometer (B) a wind gauge (C) a
wind vane (D) an anemometer (E) a hydrometer.
Ans D
At times hyenas feed on remains of animals killed by other animals. At other times, hyenas
themselves kill animals for food. Therefore hyenas may best be described as –– (A) scavengers
and herbivores (B) scavengers and parasites (C) scavengers and predators (D) herbivores and
predators e. herbivores and parasites
Ans C
Autecology is defined as the study of interrelationship of (A) many species of organisms and their
environment (B) same species of organisms and their environment. (C) organisms in the
atmosphere. (D) organisms under the earth’s surface. (E)None of the above.
Ans B
Autotrophs are also described as –– (A) Consumers (B) Decomposers (C) Carnivores (D)
Producers (E) Herbivores
Ans D
If three 30cm lengths of glass tubing are tightly packed with clay, sand and loamy soils
respectively and then stood in a beaker of water for one week the level of water will be (A)
Lowest in the tube with clay (B) The same in all the tubes (C) Lowest in the tube with loamy soil
(D) Highest in the tube with sandy soil (E) Lowest in the tube with sandy soil
Ans E
In a community bacteria and fungi are referred to as –– (A) producers (B) consumers (C)
scavengers (D) tertiary consumers (E) decomposers. Ans E

Puddles, Ponds, Rivers, Seas and Oceans are grouped together as –– (A) Ecosystem (B) Biosphere
(C) Aquatic habitat (D) Terrestrial habitat (E) Marine environment#
Ans C
The feeding pattern in an ecosystem is called………….. (A) Pyramid of energy (B) Food web (C)
Food chain (D) Pyramid of member (E) Ecology
Ans B
The orderly changes that occur slowly and naturally in plant and animal communities in a given
area over a period of time until a stable community is established is called –– (A)
Transformational change (B) ecological succession. (C) survival of the fittest. (D) weather
change (E) environmental change.
Ans B
The sign + is used to indicate an association where an organism gains, while 0 is used where an
organism is unaffected. An association indicated as +0 is known as –– (A) predation (B)
commensalism (C) parasitism (D) competition (E) ammensalism
Ans B
The sum total of all the roles an organism plays in a habitat is referred to as (A) ecology. (B)
ecosystem. (C) habit. (D) habitat. (E) niche
Ans E
Which of the following factors does not control population growth? (A) Food shortage (B)
Emigration (C) Predation (D) Abundance of food (E) Natural disaster
Ans D
Which of the following statements best describe an ecosystem? (A) A place where living
organisms can live successfully. (B) The interactions between living organism in a habitat and the
non-living part of the environment. (C) A biological association between a plant and an
animal. (D) A system of grouping organisms in a habitat. (E) None of the above.
Ans B
Which of these represents a correct food chain in nature? (A) Crustacea → diatom →fish → man
(B) Diatom → crustacea → fish → man (C) Fish → crustacea → man → diatom (D) Diatom → fish
→ crustacea → man (E) None of the above.
Ans B
is involved in the mechanism of expelling water from the protozoans during the
process of___________ (A) Contractile vacuole, Osmoregulation (B) Contractile vacuole,
Phagocytosis (C) Food vacuole, Ultrafilteration (D) Food vacuole, Pinocytosis (E) Cell membrane,
Pinocytosis
Ans A
__ is used for photosynthesis in Euglena sp. (A) Reservoir (B) Nucleus (C)
Chloroplast (D) Paramylon granule (E) Pellicle
Ans C
A heart with four chambers is found in______________ (A) Fishes (B) Insects (C) Snails (D) Rats
(E) Worms
Ans D
Animal cell does not have a __ (A) Membrane (B) Nucleolus (C) Food Vacuole (D) Cell
wall (E) Golgi body
Ans D
Beriberi is caused by deficiency of vitamin_____________ (A) A (B) D (C) K (D) E (E) B. Ans E
Compound eyes are found in which of the animals below (A) Rat (B) Cow (C) Snail (D) Ant (E) Jelly
fish
Ans D
Dental formula of man consist of (A) i 2/2, c2/2, pm2/2, m3/3 (B) i1/1, c2/2, pm2/2, m3/3 (C)
i2/2, c1/1, pm3/2, m2/2 (D) i2/2, c1/1, pm2/2, m2/2 (E) i2/2, c1/1, pm2/2, m3/3
Ans E
During digestion of food, passage of chyme through the duodenum enables it to become a
watery liquid called__________ (A) Digested food (B) Chymatic product (C) Chyle (D) Soluble
food (E) Dissolved food Ans C

Emulsification of fat and oils is caused by______________ (A) Lipase (B) Ptyalin (C) Trypsin (D)
Maltase (E) Bile
Ans E
Every mammal has (A) One Kidney (B) Two pairs of Kidneys (C) One pair of Kidneys (D) Four
Kidneys (E) None of the above
Ans C
Faeces is removed from the body in a process called (A) Digestion (B) Egestion (C) Elimination
(D) Excretion (E) Evacuation
Ans B
Glomerulus is found in the______________ (A) Ovary (B) Testes (C) Brain (D) Kidney e).
Stomach
Ans D
In the respiratory system of man, diffusion of gases takes place in (A) Trachea (B) Bronchi (C)
Alveoli (D) Bronchioles (E) None of the above
Ans C
Incisors are used for (A) Tearing food (B) Cutting food (C) Grinding food (D) Shearing food (E)
Crushing food
Ans B
Nematocysts are produced by special cells found in (A) Nematodes (B) Annelids (C)
Platyhelminthes (D) Cnidarians (Coelenterates) (E) Arthropods
Ans D
One of the following is not a function of the skin (A) Excretion (B) Protection (C) Homeostasis
(D) Reproduction (E) Absorption of vitamin D
Ans D
Open circulatory system is found in _ (A) Lizard (B) Toad (C) Fish (D) Insect (E)
Chicken
Ans D
Ovary is to the female reproductive system as________ is to the male reproductive system (A)
Penis (B) Urethra (C) Testis (D) Cowper’s gland (E) Prostate gland
Ans C
Possession of pinna is a characteristic feature of (A) Mammals (B) Reptiles (C) Fishes (D)
Amphibians (E) All of the above
Ans A
Tadpoles respire with (A) Lungs (B) Nostril (C) Gills (D) Spiracles (E) Siphon Ans C
The excretory organ in the earthworm is………….. (A) Malphigian tubule (B) Stoma (C)
Nephriduim (D) Flame cells (E) Gills
Ans C
The nerves that connect the eyes to the brain are called –– (A) Cranial nerves (B) Optical nerves
(C) Sensory nerves (D) Olfactory nerves (E) Optic nerves.
Ans E
The nerves that connect the eyes to the brain are called –– (A) Cranial nerves (B) Optical nerves
(C) Sensory nerves (D) Olfactory nerves (E) Optic nerves.
Ans E
The parasympathetic nervous system is involved in (A) Dilation of pupil of the eye (B) Control
the activities of smooth muscles (C) Dilatation of the skin (D) Controls thinking in mammals (E)
Increased metabolism
Ans B
The part of the alimentary system of a bird where grinding of food occurs is (A) Crop (B)
Stomach (C) Cloaca (D) Rectum (E) Gizzard
Ans E
The part of the ear that contains receptors that convert the fluid motion into action potential is
called –– (A) Auditory nerve (B) Ossicles (C) Semicircular canals (D) Cochlea (E) Oval window
Ans D
The thoracic region of the vertebral column is made up of __ vertebrae. (A) 5 (B) 7 (C) 4
(D) 12 (E) 10
Ans D
Which of the animal below is poikilothemic? (A) Toad (B) Chicken (C) Bat (D) Lion (E) Dove Ans A

Which of the structures below is found in reptiles and birds (A) Scales (B) Legs (C) Beaks (D)
Claws (E) All of the above
Ans A
Which of these animals is photosynthetic? (A) Paramecium sp. (B) Amoeba sp. (C) Euglena sp.
(D) Hydra sp. (E) None of the above
Ans C
Which of these organs regulate the amount of sugar in the blood? (A) Liver (B) Kidney (C) Spleen
(D) Lung (E) Pancreas
Ans E
The basis for growth and asexual reproduction is (A) meiosis (B) cytokinesis (C) mitosis (D)
Cytogenesis (E) Cell elongation.
Ans C
The process which ensures that the chromosome number for each species of organism remain
constant from generation to generation is called (A) fission (B) fusion (C) meiosis (D) mitosis
(E) oogenesis
Ans C
Which of the following is a major factor in variation among organisms? (A) Inbreeding (B)
Backcrossing (C) Test crossing (D) Sexual reproduction (E) Gene dominance
Ans D
__ is an example of an invertebrate (A) Millipede (B) Fish (C) Toad (D) Snake (E) Skin Ans A
__ is the odd one in the list below (A) Mosquito (B) Bee (C) Moth (D) Tick (E)
Beetle
Ans D
_ are flatworms (A) Platyhelminthes (B) Annelida (C) Nematoda (D) Diplopoda (E)
Chilopoda
Ans A
_ is an example of a unicellular organism (A) Amoeba sp. (B) Hydra sp. (C) Ascaris
sp. (D) Taenia sp. (E) Obelia sp.
Ans A
_ level is the highest level of organization in animals. (A) System (B) Tissue (C)
Organ (D) Cellular (E) Protoplasmic
Ans A
Crocodiles are _ (A) Fishes (B) Amphibians (C) Mammals (D) Birds (E) None of the
above
Ans E
The mutation theory of organic evolution was propounded by (A) Gregor Mendel (B) Hugo de
Vrics (C) Jean Lamarck (D) Charles Darwin (E) Robert Hookes.
Ans D
The theory of natural selection was developed by (A) Lamarck and Darwin (B) Darwin and
Wallace (C) Wallace and Mendel (D) Mendel and Lamarck (E) Hooke and Darwin.
Ans B
Which is the odd animal in the list below? (A) Lizards (B) Snakes (C) Turtles (D) Tortoise (E) Toad Ans E
Which of the following sources is not an evidence of evolution? (A) Fossil records B. Comparative
anatomy C. Comparative embryology (D) Human behavior (E) None of the above
Ans D
___ is an endoparasite (A) Earthworm (B) Tapeworm (C) Mosquito (D) Housefly (E)
Tsetse fly
Ans B
The causative agent of bird flu is a (A) Virus (B) Bacteria (C) Fungus (D) Protozoan (E) Ricketsia. Ans A
In lower plants like mosses, the structure which performs the functions of roots of higher plants
is called (A) root hairs (B) rootlets (C) hyphae (D) rhizoids (E) thalli.
Ans D

One common feature of fungi, algae, mosses and ferns is that they are (A) photosynthetic (B)
show alternation of generation (C) can survive harsh weather conditions (D) have no seeds (E)
conjugate
Ans D
The following are major groups of the plant kingdom EXCEPT (A) Bryophyta (B) Chlorophyta (C)
Pteridophyta (D) Spermatophyta (E) Thallophyta
Ans B
_____________is a form of sexual reproduction (A) Grafting (B) Budding (C) Fission (D)
Conjugation (E) Regeneration
Ans D
Sexual reproduction in Spirogyra is called (A) Fertilization (B) Symbiosis (C) Conjugation (D)
Reproduction (E) Mutualism
Ans C
The carrier of the hereditary characters in plants is the (A) Cell (B) nucleus (C) chromosome (D)
chloroplast (E) gene
Ans E
All are necessary for photosynthesis except_____________ (A) Water (B) Chlorophyll (C)
Sunlight (D) Carbon dioxide (E) Oxygen
Ans E
Growing yam tendrils climb for support. This growth response is (A) haptotropism (B) geotropism
(C) phototropism (D) hydrotropism (E) chemotropism.
Ans A
Which is the correct order in an evolutionary sequence for the following plant groups? (A)
Bacteria → ferns → algae → mosses → seed plants. (B) Bacteria → ferns → mosses → algae →
seed plants. (C) Bacteria → algae → mosses → ferns → seed plants. (D) Bacteria → mosses →
algae → ferns → seed plants. (E) Seed plants → ferns → mosses → algae → bacteria.
Ans C
———— is not part of the whorls of a flower. (A) calyx (B) corolla (C) androecium (D)
Antheridium (E)Gynoecium
Ans D
A dry fruit which can break into several parts each containing one seed is a (A) caryopsis (B)
aggregate fruit (C) legume (D) follicle (E) schizocarp
Ans E
A dry indehiscent, winged fruit formed from one carpel is known as a (A) Schizocarp (B)
Caryopsis (C) Samara (D) nut (E) Follicle
Ans C
A true fruit is formed from (A) fertilized ovary and other floral parts (B) a fertilized ovary (C) a
fertilized ovary and calyx (D) a fertilized and fleshy receptacle (E) an unfertilized ovary and other
floral parts
Ans B
Irish potato is a (A) bulb (B) tap root (C) rhizome (D) root tuber (E) stem tuber Ans D
One major difference between an Angiosperm and a Gymnosperm is that seeds in Gymnosperms
are borne in (A) Cones (B) fruits (C) flowers (D) ovary (E) ovule
Ans A
Reserved food material in the seed is stored in the (A) epicarp (B) endocarp (C) endosperm (D)
mesocarp (E) all parts
Ans C
What type of fruit is a mango fruit? (A) Berry (B) Hesperidium (C) Drupe (D) Nut (E) Mango fruit C
Which of the following species exhibit an aerial root? (A) Ficus (B) Centrosema (C) Antigonon
(D) Lantana (E) Dahlia
Ans A
Which of these plants has an emerginate apex? (A) Bauhinia (B) Pistia (C) Ixora (D) Musa (E)
Terminalia
Ans A
Which plant stores food in its roots? (A) Cassava (B) cocoyam (C) Irish potato (D) onion (E)
yam.
Ans A

An example of Vascular tissues is ————– (A) Trichome (B) Xylem (C) Stomata (D) Epidermis
(E) Parenchyma
Ans B
The living part of phloem tissue is (A) sieve plate (B) companion cell (C) sieve element (D)
cytoplasm#
Ans B
Which of the following tissues are made up of dead cells (A) meristems (B) xylem vessels (C)
cambium (D) mesophyll (E) palisade
Ans B
A plant vacuole contains (A) dissolved chemicals, sugars, salts, pigments and crystals (B) waste
products of metabolism, DNA, RNA and crystals (C) pigments, crystals, DNA and waste products
of metabolism (D) RNA, DNA, sugars and salts
Ans A
Excessive loss of water in plants is known as (A) Osmosis (B) Osmoregulation (C) Transpiration (D)
Excretion
Ans C
Starch granules in plants is equivalent to _ granules in animals (A) Food (B)
Chromatin (C) Lysosome (D) Mitochondria (E) Glycogen
Ans E
Which of the following is a plant excretory product? (A) Oil (B) Cytokinin (C) Resin (D)
amino acids (E) gibberellins.
Ans C
A plant which grows on another without causing harm to the host plant is called –– (A) a
parasite (B) a saprophyte (C) an epiphyte (D) a predator (E) a prey.
Ans C
Plants which can survive in places where water supply is limited are (A) bryophytes (B)
mesophytes (C) xerophytes (D) hydrophytes (E) pteridophytes.
Ans C

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