OAU Biology 2011/2012 Past Questions

Practice each question, then open it to see the full details.

Which of the following is the basic unit of classification of plants and animals?

A.genus
B.species
C.phylum
D.kingdom

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

An interlocking form / pattern of feeding relationship is called

A.food chain
B.nutrition
C.consumer
D.food web

The group of animals described as glorified reptiles is

A.Pisces
B.Amphibian
C.Ayes
D.Mammals

The anal and dorsal fins of fish are used for:

A.steering
B.buoyancy
C.upward movement
D.controlling rolling movement
E.downward movement

The significance of mitosis includes all of the following except

A.genetic stability
B.growth
C.cell replacement
D.degeneration

Which of the following is absent in the prophase stage of meiosis?

A.leptonem
B.zygonem
C.pachynem
D.triplonema

The photosynthetic pigments include:

A.chlorophyll and carotenoids
B.chloroplasts and cytochromes
C.melanin and haemoglobin
D.carotenoids and haemoglobin

Which of the following produces both hormones and enzymes?

A.pancreas
B.ileum
C.gall bladder
D.kidney

Of the following, which one lacks chaetae, tentacles and antennae?

A.snail
B.earthworm
C.millipede
D.crab
E.snake

Etilolation is caused by the influence of

A.CO2
B.water
C.mineral salts
D.HCI
E.light

Epigeal germination can be found in:

A.sorghum
B.maize
C.millet
D.groundnut

........... is not sex-linked

A.stunted growth
B.river blindness
C.haemophilia
D.colour blindness

The pyrenoid in Spirogyra:

A.usually contains starch
B.is suspended by cytoplasmic strands
C.is mainly used for respiration
D.excrete waste product

Flower is to the angiosperm as ...... is to gymnosperm.

A.pines
B.cords
C.cone
D.anther

Alternation of sexual and asexual method of reproduction is found in

A.euglena
B.ferns
C.blue green algae
D.grasses

......... is not a non-seed plant.

A.fern
B.conifer
C.cycad
D.none of the above

Which type of association is shown by a fern growing on the stem of oil palm?

A.epiphytism
B.saprophytism
C.commensalisms
D.symbiosis

Which of the following is likely to encourage inbreeding in plants?

A.dioecious
B.protandious
C.monoecious
D.hermaphrodite

The biological association that contributes directly to succession in a community is:

A.competition
B.predation
C.parasitism
D.commensalisms

Grasses recover quickly from bush fires in the savanna because of their

A.fibrous roots
B.succulent stems
C.perenating organs
D.rapid growth rate

The ability of an organism to live successfully in an environment is known as

A.resistance
B.competition
C.succession
D.adaptation

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

is an autotrophic mode of nutrition

A.chemosynthesis
B.saprophytism
C.parasitism
D.symbiosis

Which of the following is not an organ?

A.leaf
B.heart
C.kidney
D.bone