Which of the organisms represented are notable agricultural pests?
- A. II and IV
- B. I and IV
- C. I and III
- D. II and III
The part of the mammalian ear responsible for the maintenance of balance is the
- A. cochlea
- B. pinna
- C. perilymph
- D. vestibular system
In which of the following species is the biomass of an individual the smallest?
- A. Tilapia sp
- B. Agama sp
- C. Bufo sp
- D. Spirogvra sp
The path followed by air as it passes through the lungs in mammals is
- A. bronchi ⇢ trachea ⇢ alveoli ⇢ bronchioles
- B. bronchioles ⇢ alveoli ⇢ bronchi ⇢ trachea
- C. trachea ⇢ bronchi ⇢ bronchioles ⇢ alveoli
- D. trachea ⇢ bronchioles ⇢ bronchi ⇢alveoli
Strong short and concical beak to pick and crush seeds is an adaptive feature of
- A. duck
- B. owl
- C. weaver bird
- D. hawk
Which of these organisms partly digest its food extracellularly?
- A. Butterfly
- B. Cockroach
- C. Spider
- D. Mosquito
The bacteria that is found in the root nodules of leguminous plants is
- A. clostridium
- B. rhizobium
- C. nostoc
- D. azotobacter
An example of a non-bio degrable pollutants is
- A. dung
- B. bones
- C. ceramics
- D. woods
In which of the following groups of vertebrates is parental care mostly exhibited?
- A. Aves
- B. Reptilia
- C. Amphibia
- D. Mammalia
When sickle cell carrier marries a normal woman, the probability of them having a normal offspring is
- A. 0.75
- B. 0.25
- C. 0.5
- D. .1
The arrangement of ovules attached to the sides of a syncarpous ovary with a single chamber is referred to as
- A. free-central placentation
- B. axile placentation
- C. parietal placentation
- D. marginal placentation
The hereditary characters in plants and animals are located on the
- A. gene
- B. mucleus
- C. chromosome
- D. cell
The crossing of individuals of the same species with different genetic characters is
- A. croos breeding
- B. polygenic inheritance
- C. non-disjunction
- D. inbreeding
The rate of transpiration is NOT affected by
- A. the weight of the stomata pores
- B. humidity
- C. temperature
- D. the size of the stomata pores
Which of the following organs regulates the levels of water. salts, hydrogen ions, and urea in the mammals?
- A. Kidney
- B. Colon
- C. Bladder
- D. Liver
Exo-erythrocytic phase of the life cycle of malaria parasite occurs in the
- A. liver of humans
- B. reticuloendothelial cells of humans
- C. Malphigian tubules of mosquito
- D. brain of humans
The relationship between a termite and the protozoam in its intestine is described as
- A. predation
- B. saproplytism
- C. symbiosis
- D. parasitism
In the nitrogen cycle, the nitrates in the soil are converted to atmospheric nitrogen by
- A. puterfying bacteria
- B. nitrogen-fixing bacteria
- C. nitrifying bacteria
- D. denitrifying bacteria
The sequence of the one-way gaseous exchange mechanism in a fish is
- A. gills ⇢ operculum ⇢ mouth
- B. mouth ⇢ gills ⇢ operculum
- C. mouth ⇢ operculum ⇢ gills
- D. operculum ⇢ mouth ⇢ gills
The adaptive importance of the nuptial flight from termite colonies is to
- A. ensure cross-breeding between members of one colony and another
- B. disperse the reproductives in order to establish new colonies
- C. provide abundant food for birds and other animals during the early rains
- D. expel the reproductives so as to provide enough food for other members
Seed plants are divided into
- A. monocoty ledons and dicotyledons
- B. tracheophytes and ferns
- C. angiosperms and gymnosperms
- D. thallophytes and bryophytes