The abiotic factor that affect the population growth of an organism is
- A. predator
- B. rainfall
- C. food shortage
- D. disease
The chemical and physical composition of soil is an example of
- A. climatic factor
- B. topographic factor
- C. Edaphic factor
- D. chemical factor
Which of the following statements explains the theory of natural selection?
- A. There is no struggle for existence
- B. New species get better adaptation
- C. The weaker offspring are eliminated
- D. Unused structures disappear later
One of the components of xylem tissue is
- A. companion cell
- B. tracheid
- C. sieve tube
- D. epidermal
One of the characteristics of secondary succession is that it
- A. starts on a bare surface
- B. takes longer time to reach climax
- C. starts on already colonized surface
- D. starts with low organism
Gaseous exchange takes place through the plasma membrane in
- A. hydra
- B. paramecium
- C. flatworm
- D. earthworm
In glycolysis, glucose is broken down through series of reactions in the presence of enzyme and absence of oxygen to produce
- A. Acetyl-coenzyme + ATP
- B. Phosphorylated glucose
- C. pyruvic acid + ATP
- D. Amino acid
The rhizoid of liverwort is
- A. unicellular and unbranched
- B. multicellular and branched
- C. unicellular and branched
- D. multicellular and unbranched
The depressed side of paramecium which is lined with cilia leads to a tube-like structure called
- A. anal pore
- B. oral groove
- C. gullet
- D. food vacuole
Which of the following processes releases oxygen to the atmosphere?
- A. Respiration
- B. Combustion
- C. Decomposition
- D. photosynthesis
A succession that occurs in an area where there are no pre-existing community is called
- A. tertiary succession
- B. primary succession
- C. post-primary succession
- D. secondary succession
A community with a population of two million three hundred and ten thousand people living in an area of two thousand three hundred and ten square kilometres has a population density of
- A. 10000
- B. 10
- C. 100
- D. 1000
Reproduction in paramecium is by
- A. binary fission
- B. budding
- C. spore formation
- D. fragmentation
Use the diagram above to answer the question that follows
The organelle that shows the organism has plant characteristics is
- A. I
- B. II
- C. III
- D. IV
The central nervous system comprises of
- A. brain and somatic
- B. brain and spinal cord
- C. spinal cord and somatic
- D. brain only
One of the ways of controlling Schistosomiasis is by
- A. destroying water snails and water weeds
- B. clearing the bushes around the house
- C. washing hands after using the toilet
- D. properly washing fruits before eating them
Similar structures that are modified to work in different ways in different organisms are referred to as
- A. homologous structures
- B. analogous structures
- C. divergent structures
- D. convergent structures
Darwin’s theory of evolution is based on the principle of
- A. use and disuse of organ
- B. natural selection
- C. acquired characteristics
- D. mutation
Which of the Nigeria states is Northern guinea savanna located?
- A. Borno
- B. Kano
- C. Oyo
- D. Kwara
Which of these is a respiratory organ in mammals?
- A. skin
- B. mouth
- C. heart
- D. lungs
The causative agent of tuberculosis is
- A. virus
- B. bacteria
- C. protozoa
- D. fungi