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1.
One of the functions of xylem
.
A. strengthening the stem
B. manufacturing food
C. conducting manufactured food
D. none of the above.
Explanation.
Xylem contains several large thick-walled tubes called in which the soil solution is carried from the roots to the leaves (C).

2.
People suffering form myopia
.
A. can see near objects clearly
B. can see far away objects clearly
C. cannot see any object clearly
D. are colour-blind
Explanation.
Myopia is short-sightedness i.e. can only see near object clearly (A)

3.
The cilia in paramecium are used for
.
A. respiration
B. locomotion
C. protection
D. excretion
Explanation.
Cilia is common to protozoa like paramecium, it is used for movement (locomotion) (B).

4.
Which of these types of skeleton is most appropriate to the cockroach?
.
A. hydrostatic skeleton
B. exoskeleton
C. endoskeleton
D. cartilaginous skeleton
Explanation.
Exoskeleton is common to arthropod like cockroach (B).

5.
When proteins are broken down they provide
.
A. oxygen
B. carbohydrate
C. energy
D. amino acids
Explanation.
Protein is built from units of amino acid. Amino acid is the product of protein digestion (D).

6.
The function of lenticel is
.
A. to receive excess water in the plant
B. to absorb water from the atmosphere
C. for gaseous exchange
D. to absorb light
Explanation.
Lenticels is the organ for gaseous exchange in the stem of plant (C).

7.
Which of the following is characteristic of the animal cell
.
A. presence of chioroplasts
B. possession of a cellulose cell wall
C. absence of large vacuoles
D. presence of large vacuoles
Explanation.
The vacuole in animal cell is smaller when compared to that of plant cell (C).

8.
In the life history of Schistosoma (Bilharzia), of the following is the intermediate host
.
A. man
B. snail
C. mosquito larva
D. fish
Explanation.
Snail is the secondary host of bilharzias (B)

9.
The hormone which tones up the muscles of a person in the time of danger is from the
.
A. thyroid gland
B. pancreas
C. adrenal gland
D. spleen
Explanation.
The adrenal glands near the kidneys produce neutral hormones, one of which is adrenalin. Adrenal glands are stimulated by the nervous system when an animal feel frightened or anxious (C).

10.
The study of the organisms and the environment of an abandoned farmland is the ecology of
.
A. a community
B. a population
C. a species
D. an ecosystem
Explanation.
The collection of population makes up a community. (A)

11.
At fertilization
.
A. one chromosomes from the male joins another form the female
B. one gene from the male combines with the other from the female
C. the male nucleus fuses with the female nucleus
D. one set of h\chromosome combines with another set form the female
Explanation.
(B)

12.
The neck region of the tapeworm (Taenia spp.) is responsible for the
.
A. production of eggs
B. the storage of eggs
C. the formation of new segments
D. the development of the suckers.
Explanation.
(C)

13.
The movement of molecules from a region of higher concentration to one of lower concentration is
.
A. diffusion
B. transpiration
C. osmosis
D. plasmolysis
Explanation.
Diffusion is the movement of molecules or ions form a region of higher concentration to that of lower concentration. (A)

14.
The region of cell division in a root is
.
A. root cap
B. endodermis
C. xylem
D. Meristem
Explanation.
Tissue which are capable of cell division are called Meristem. Those responsible for the increase of length of roots and stems are found at the lips and are therefore the region of cell division which is at the apical region (i.e. tips of the roots) (A)

15.
Which of the following is not an excretory organ?
.
A. Luns
B. kidney
C. leaf
D. large intestine
Explanation.
Large intestine is involved in digestive system (D)

16.
The part of the mammalian brain responsible for maintaining balance is
.
A. medulla oblongata
B. cerebellum
C. optic lobe
D. cerebrum
Explanation.
The cerebellum is concerned with hearing, balance and s\muscular control (C).

17.
A sugar solution was boiled with Fehling’s solutions A and B and the colour remain blue. The sugar tested was
.
A. glucose
B. maltose
C. fructose
D. sucrose
Explanation.
Test for reducing sugar (glucose)

18.
The blood vessel which carries digested food from the small intestine to the liver is
.
A. renal vein
B. renal artery
C. hepatic artery
D. hepatic portal vein
Explanation.
Hepatic portal vein carries digested food form small intestine (D).

19.
The maize grain is regarded as a fruit and not a seed because
.
A. it is covered by a sheath of leaves
B. the testa and fruit wall fuse after fertilization
C. it has both endosperm and cotyledon
D. the pericarp and seed coat are separate
Explanation.
Maize is really a fruit, because the outer coat covering the grain represents the pericarp of the fruit fused with the testa to the seed (B).

20.
Identical twins are produced under one of the following conditions
.
A. Two ova fertilized at the same time by the sperm
B. One ovum fertilized, divides to give two embryos
C. Two ova fertilized by one sperm
D. One ovum fertilized by two sperms
Explanation.
The ovum divides after fertilization (B).

21.
Which of the following hormones is produced during fright or when agitated?
.
A. insulin
B. adrenalin
C. thyroxine
D. pituitary
Explanation.
Adrenalin is produced form adrenal gland (B).

22.
Grasses - Grasshopper - Lizards - Snakes - Hawks. In the food chain, the organisms which are the least in number are
.
A. grasses
B. hawks
C. lizards
D. snakes
Explanation.
The number decreases while the size of the species increase as we move to the upper trophic level of the food chain (B).

23.
One significant difference between roots and stem is that
.
A. branch root originate in the pericycle while branch stems do not.
B. Stems are always below the ground while rots are always under the ground
C. Stems are positively geotropic while roots are negatively geotropic
D. Stems are sometimes used for storage while roots are never so used.
Explanation.
(A)

24.
The arrangements below are steps in protein digestion. Which is the correct sequence? A - polypeptides, B - protein, C - amino acids, D - peptones
.
A. a->b---c->d
B. c-d---a-b
C. b->c->a->d
D. b->d->a-c
Explanation.
Protein > peptone(d) > polypeptide (a)> amiftacid(c). (D).

25.
Partially digested food ready to leave the stomach is called
.
A. chime
B. curd
C. glycogen
D. paste
Explanation.
The walls of the stomach are muscular and regular peristatic movements churn up the food, mixing it thoroughly with the gastric juice. By the time it is ready to leaves the stomach, the food looks like a watery paste, called CHYME (A).

26.
The particles found in the blood which play an important role in blood clotting are called
.
A. platelets
B. red blood cells
C. monocytes
D. granulocytes
Explanation.
(A)

27.
In a cross between a normal male and a female carrier for haemophiliac disease, the percentage of their sons expected to suffer the disease as haemophiliac is
.
A. 25%
B. 50%
C. 70%
D. 45%
Explanation.
Heamophilia is an abnormality controlled by a recessive gene located on the y - chromosome. The percentage of the carrier is 50% (B)

28.
Which of the following is the basic unit of classification of plants and animals?
.
A. genus
B. species
C. phylum
D. kingdom.
Explanation.
All living things are classified into 2 major kingdoms, plant and animal kingdom (D)

29.
Alternation of sexual and asexual method of reproduction is found in
.
A. euglena
B. blue green algae
C. ferns
D. grasses
Explanation.
The prothallus of a fern is equivalent to the gametophyte generation of a moss because it generations. That is, in their life cycle a sexual (sporophyte) generation and sexual (gametophyte) generation alternate (B). bears the sexual organs, while the fern plant is equivalent to the sporophyte or spore bearing generation, so we can say plant like fern and mosses show alternation of generations. That is, in their life cycle a sexual (sporophyte) generation and sexual (gametophyte) generation alternate (B).

30.
_________ is not a non-seed plant
.
A. cycad
B. conifer
C. fern
D. none of the above
Explanation.
Confer belongs to the gymnosperms family. These are plant with naked seeds, they do not bear flowers. The seeds are borne on special structures called Cones (B)

31.
Which type of association is shown by a fern growing on the stem of oil palm?
.
A. epiphytism
B. saprophytism
C. commensalism
D. symbiosis
Explanation.
Fern and oil-palm commensalism. The epiphyte (fern) get enough sunlight to carry out photosyntehsis by climbing on the palm oil tree. In commensalism association, one partner benefits while the other, the host is unaffected c.

32.
Which of the following is likely to encourage inbreeding in plants?
.
A. dioecious
B. predation
C. monoecious
D. hermaphrodite
Explanation.
Plants in which both pistillate and staminate flowers are borne on the same plant are called Monoecius. Diecious is when pistillate and staminate are on separate plant. Monoecius encourage imbreeding c.

33.
The biological association that contributes directly to succession in a community is
.
A. competition
B. predation
C. parasitism
D. commensalism
Explanation.
Competition involves the interactions among two organism of the same species or different species in which one outgrow or survive (A)

34.
Grasses recover quickly form bush fires in the savanna because of their _______
.
A. fibrous roots
B. succulent stems
C. perennating organs
D. rapid growth rate
Explanation.
This is because of their fibrous roots which germinate rapidly and are fire resistance (A)

35.
The ability of an organism to live successfully in an environment is known as______________
.
A. resistance
B. competition
C. succession
D. adaptation
Explanation.
Living organ-isms are found in different types of habitats. These organisms show feature that enable them to live successfully in these environments. These may be functional, behavioural or structurally. Such factures are called adaptation (D).

36.
The community of plants in which the same species occur from year to year is the ______
.
A. perennial species
B. climax species
C. pioneer vegetation
D. annual species
Explanation.
This is the final community or what ecologist call the Climax of the succession (B)

37.
_________ is an autotrophic mode of nutrition
.
A. chemosynthesis
B. saprophytism
C. parasitism
D. symbiosis
Explanation.
Chemosynthesis is the synthesis of organic compounds from CO2 and H20 but the energy instead of coming form light is supplied by special method of respiration involving the oxidation of various inorganic materials such as hydrogen sulphide ammonia. Chemosynthesis is used by certain bacteria (A).

38.
Which of the following is not an organ?
.
A. leaf
B. kidney
C. heart
D. bone
Explanation.
Bone is not an organ but a tissue (D)

39.
Mendel's first law is known as the law of
.
A. use and disuse
B. segregation of genes
C. evolution
D. independent assortment of genes.
Explanation.
Mendelian’s first law of segregation states that contracting factors (i.e. genes are present in pairs in non-reproductive or somatic cells so that when an organism forms a gamete the pair separate (B)

40.
An interlocking form pattern of feeding relationship is called
.
A. food chain
B. nutrition
C. consumer
D. food web
Explanation.
Numerous food chains are present in an ecosystem and these are linked together in a food web (D).

41.
The group of animals described as glorified reptiles is
.
A. Pisces
B. amphibian
C. Ayes
D. Mammals
Explanation.
(C)

42.
The anal and dorsal fins of fish are usedfor
.
A. steering
B. buoyancy
C. upward movement
D. controlling rolling movement
E. downward movement
Explanation.
Pectoral and pelvic fins are moved independently and are used for steering and balancing and also for back and forward movement. (D)

43.
The significance of mitosis includes all of the following except
.
A. genetic stability
B. growth
C. cell replacement
D. degeneration
Explanation.
Mitosis takes place when cells divide during growth, development and also during asexual reproduction. Mitosis enhance generation stability but is not involved in cell replacement (C).

44.
Which of the following is absent in the prophase stage of meiosis?
.
A. leptonem
B. zygonem
C. pachynem
D. triplonema
Explanation.
-

45.
The photosynthetic pigments include
.
A. chlorophyll and carotenoids
B. chloroplasts and cytochromes
C. melanin and heamoglobin
D. carotenoids and haemoglobin
Explanation.
Haemoglobin is involved in blood circulation, Melanins are for skin colouration, cytochromes are not pigments involved in photosynthesis. The chloroplasts contain a mixture of several pigments, the main one being chiorophylls, caretenoids and xanthophyll (A)

46.
Which of the following produces both hormones and enzymes?
.
A. pancreas
B. ileum
C. gall bladder
D. kidney
Explanation.
Pancreas produced insulin for sugar regulation and produce enzymes like pancreatic amylase, lipsin and pancreatic lipase (A).

47.
Of the following{} which one lacks chaetae{} tentacles and antennae?
.
A. snail
B. earthworm
C. millipede
D. snake
Explanation.
Snake do not possess all the mentioned features (D)

48.
Etilolation is caused by the influence of
.
A. CO2
B. water
C. mineral salt
D. HCI
E. light
Explanation.
Light is required for photosynthesis and chlorophyll without which photosynthesis can not take place. A seedling grown in the dark becomes etiolated. It is yellow, due to lack of chlorophyll (E).

49.
Epigeal animation can be found in
.
A. sorghum
B. maize
C. millet
D. groundnut
Explanation.
Epigeal germintaion is defined as the type of germination in which the cotyledons or seed leaves are carried above the soil surface. It is associate with dicotyledons like groundnut, cowpea and melon (D).

50.
_________ is not sex-linked.
.
A. Stunted growth
B. river blindness
C. haemophillia
D. colour blindness
Explanation.
River blindness is caused by roundworm and other filarial worms (B)

51.
The pyrenoid in spirogyra
.
A. usually contains starch
B. is suspended cytoplasmic strands
C. is mainly used for respiration
D. excrete waste product.
Explanation.
Starch grains normally accumulate around the pyrenoids when exposed to light (A).

52.
Flower is to the angiosperm as ______ is to gymnosperm
.
A. pines
B. cords
C. cone
D. anther
Explanation.
C

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