The mouth part of the insect is adapted for
- A. biting and chewing
- B. sucking and chewing
- C. biting and sucking
- D. piercing and sucking
The anatomical evidence usually used in support of the evolutionary relationship among whales, human, birds, and dogs is the possession of
- A. thick skin
- B. pentadactyl limb
- C. tail
- D. epidermal structure
A phenomenon by which an animal goes into a state of dormancy during the dry season is called
- A. hibernation
- B. aestivation
- C. incubation
- D. deactivation
Red coloration on the head of a male lizard helps it to
- A. mark is territory
- B. camouflage in the enviroment
- C. secure its mate
- D. defend itself
Breathing root is an adaptation for survival in the
- A. mangrove swamp
- B. desert
- C. arboreal habitat
- D. savanna
A man who has the trait for colour blindness marries a normal woman. What percentage of their children would be sufferers, carriers and normal respectively
- A. 25%, 25% and 50%
- B. 25%, 50% and 25%
- C. 50%, 25% and 25%
- D. 25%, 37.5% and 37%
The sex-linked defect in which very slight cut produces severe bleeding is known as
- A. anaesmia
- B. anorexia
- C. haemophilia
- D. haemolysis
If a woman’s genotype is Tt Qq Rr, what would be the gene content of her eggs?
- A. TQr, tqr
- B. TQR, tqr
- C. TqR, tQr
- D. tQr, TQR
In the gene locus for eye colour in humans, the allele for brown eye is dominant over the allele for blue eyes. If a homozygous brown-eyed girl has a brother with blue eyes, what are the likely phenotypes of there parents’eye colour (Eye colour is not a sex linked trait)
- A. Both parents have blue eyes
- B. Their father has blue eyes and their mother has brown eyes
- C. both parents have brown eyes
- D. Their mother has the blue eyes and their father has the brown eyes
People wit sickle-cell anaemia have haemoglobin
- A. S and are homozygous recessive
- B. A and are heterozygous recessive
- C. S and are heterozygous recessive
- D. A and are homozygous recessive
The difference and similarities among living things account for
- A. diversity
- B. stability
- C. competition
- D. evolution
People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
- A. iron
- B. lead
- C. calcium
- D. magnesium
The water-retention capacity of a soil indicates its
- A. fertility
- B. capilarity
- C. aeration level
- D. pH level
In a drought situation, plants suffer from water stress which could result in
- A. reduced biochemical activities
- B. enhanced chemical activities
- C. enhanced microbial activities
- D. reduced phototropic activities
Ecological succession ends with the formation of a stable
- A. niche
- B. population
- C. pioneer community
- D. climax community
Use the list of biomes below to answer the question below
1. Desert 2. Rain forest 3. Southern Guinea savannah 4. Northern Guinea savannah
A biome where there are many cacti and the small mammals undergo aestivation for long periods is
- A. 1
- B. 2
- C. 3
- D. 4
Use the list of biomes below to answer the question below
1. Desert 2. Rain forest 3. Southern Guinea savannah 4. Northern Guinea savannah
A biome with a low annual rainfall, few scattered trees within dense layer of grasses and found in Kano and Katsina States
- A. 1
- B. 2
- C. 3
- D. 4
The organisms with the least number of individuals in a pyramid of numbers are the
- A. secondary consumers
- B. tertiary consumers
- C. primary producers
- D. primary consumers
The correct order in a food chain involving the organisms (1)Grasses, (2)Hawks, (3)Snakes, (4)Grasshopper, (5)Lizards is
- A. 1 2 3 4 5
- B. 5 4 3 2 1
- C. 1 4 5 3 2
- D. 3 2 4 5 1
Which of the following sets is made up of decomposers?
- A. Rhizophus, earthworm and protozoa
- B. Mushroom, rhizophus and bacteria
- C. Bacteria, earthworm and nematodes
- D. earthworm, sedges and platyhelminthes