BUK Biology 2011/2012 Past Questions

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

Which of the following organisms is at tissue level of organisation

A.Euglena
B.Paramecium
C.Volvox
D.Hydra
E.Chlamydomonas

Autotrophs are also described as

A.Consumers
B.Decomposers
C.Carnivores
D.Producers
E.Herbivores

In photosynthesis, the following processes are part of the light reacton except

A.Transfer of radiant energy which reduces a cofactor
B.Absorption of radiant energy by chlorophyll
C.Utilization of the energy in the electron transfer chain to form ATP
D.Formation of glucose using energy from NADPH
E.Splitting water into its components

Which of the following is not an adaptation of small intestine for the absorption of digested food

A.Villi are well supplied with blood vessels
B.Villi are numerous and thin walled
C.Small intestine has large surface area
D.Small intestine is long and coiled
E.Small intestine leads into large intestine

A dehiscent fruit formed from several fused carpels with many seeds is classified as

A.An achene
B.A capsule
C.A follicle
D.A legume
E.A nut

The translocation of materials in plants takes place in the

A.Xylem
B.Cambium
C.Phloem
D.Parenchyma
E.Sclerenchym

An association between living organisms which one lives on and feeds at the expense of the other organism is known as

A.Parasitism
B.Commensalism
C.Mutualism
D.Symbiosis
E.Predation

Which of the following statements is not correct about food chains

A.All food chains starts with green plants
B.Food chains involve feeding relationships among organisms
C.Shorter food chains indicate more effective utilization of energy than longer ones
D.All food chains have primary consumers

Which of the following characteristics is associated with commensalism

A.Both organisms are harmful to each other
B.The association involves many organisms
C.The association is beneficial to one organism
D.Both species are beneficial to each other
E.The relationship is found only among plants

Which of the following statement is not correct about ecological effects of agricultural activities

A.The use of herbicides and pesticides in the farm can cause pollution
B.Bush burning encourages desertification
C.Excessive use of fertilizers in farms can cause pollution
D.Tillage of tropical soil with ploughs and harrows may encourage erosion

Which of the following methods is used in food preservation methods for a long time

A.Adding oil to the food
B.Exposing food to fresh air
C.Keeping the food in a store
D.Warming the food daily
E.Salting and drying the food

Which of the following is not an effect of overcrowding on a population

A.Death
B.Competition
C.Commensalism
D.Aggression
E.Cannibalism

The term used in describing effective management of national resources by man is

A.Preservation
B.Utilization
C.Economics
D.Development
E.Conservation

At which of the following stages of cell division can the cell division be said to be resting

A.Anaphase
B.Telophase
C.Prophase
D.Interphase
E.Metaphase

Which of the following represents phenotypic ratio, when a plant Rr is crossed with another plant Rr, assuming that the gene for R for round seed is dominant over wrinkled seed which is recessive

A.1:2:1
B.2:2:1
C.3:2
D.3:1
E.4:1

All hereditary characters in a cell are passed on from parent-cell to daughter-cell through the process of

A.Mitosis
B.Meiosis
C.Fertilization
D.Implantation
E.Gestation

Which of the following fixes atmospheric nitrogen

A.Rhizobium
B.Nitrosomonas
C.Nitrobacter
D.Putrefying bacteria
E.Denitrifying bacteria

The evidence for evolution can be obtained from the following except

A.Fossil
B.Anatomy
C.History
D.embryology
E.Taxonomy

The similarity between the bone structure of the arm of the human and the forelimb of a rabbit indicates

A.Adaptive radiation
B.Continuous variation
C.A common origin
D.Convergent evolution
E.adaptation to the same environment

The theory that new organs or characteristics develop in organisms when there is a need for them was postulated by

A.Charles Darwin
B.Jean Larmack
C.Gregor Mendel
D.Wallace
E.Louis Pasteur