UNN Biology 2018/2019 - Model 1 Past Questions

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

Question 1

The causative agent of bird flu is

A.protozoan
B.virus
C.bacterium
D.fungus

Objective

Question 2

Which of the following is common to the mosquito housefly and blackfly?

A.They undergo complete metamorphosis
B.They are parasites of man
C.Their immature stages are aquatic
D.Their adults have two pairs of wings

Objective

Question 3

Which of the following is an exam of parasitism

A.Fungi growing on a dead tree branch
B.A squirrel living in an abandoned nest of a bird
C.Mistletoe growing on an orange tree.
D.cattle egrets taking tasks from the body of cattle

Objective

Question 4

A crucible of 5 gm weighed 10gm after filling with fresh soil. It is then heated in an oven at 100°C for 1 hour. After cooling in a desiccator, the weight was 8gm. The percentage of water in the soil is

A.80%
B.60%
C.20%
D.40%

Objective

Question 5

The mangrove swamp in Nigeria is restricted to the

A.Sahel savanna
B.Sudan savanna
C.Guinea savanna
D.Tropical rainforest

Objective

Question 6

One adaptation shown by hydrophytes in fresh water habitats is the

A.leaves reduced to spines
B.poor development of roots and xylem tissues
C. waxy cuticle on shoot surface
D.well-developed roots and supporting system.

Objective

Question 7

A biotic factor which affects the distribution and abundance of organisms in a terrestrial habitat is

A.temperature
B.competition
C.PH
D.light

Objective

Question 8

Which of the following cell types has the least number of mitochondria?

A.Cardiac cells of the heart
B.cells of the cornified layer
C.muscle cells of the bladder
D.muscle cells of the diaphragm

Objective

Question 9

Insectivorous plants trap and kill their prey to derive

A.phosphorous
B.calcium
C.nitrogen
D.zinc

Objective

Question 10

Exhaled air differs from inhaled air in that it

A.contains less amount of carbon (IV) oxide
B.It is usually lower in temperature
C.often has more oxygen
D.usually has more water vapour

Objective

Question 11

A plant parenchyma cell also acts as a supporting tissue when it

A.becomes flaccid
B.contains crystals
C.becomes turgid
D.is pigmented

Objective

Question 12

Which of the following is NOT a function of the nucleus of a cell?

A.It controls the life processes of the cell
B.translates genetic information for the manufacture of proteins
C.It stores and carries hereditary information
D.It is a reservoir of energy for the cell

Objective

Question 13

The interaction of a community of organisms with its abiotic environment constitutes

A.a niche
B.a food chain
C.an ecosystem
D.a microhabitat

Objective

Question 14

The crossing of individuals of the same species with different genetic characters is

A.cross breeding
B.polygenic inheritance
C.non-disjunction
D.inbreeding

Objective

Question 15

Which of the following organisms is not classified as an animal?

A.Amoeba
B.Paramecium
C.Euglena
D.Obelia

Objective