Which of the following instruments is used to measure relative humidity?
- A. Hydrometer
- B. Thermometer
- C. Hygrometer
- D. Anemometer
The vector of the malaria parasite is
- A. female Aedes mosquito
- B. female Anopheles mosquito
- C. male Culex mosquito
- D. female Culex mosquito
The interaction of a community of organisms with its abiotic environment constitutes
- A. niche
- B. a food chain
- C. an ecosystem
- D. a mirohabitat
Which of the following is a feature of the population pyramid of a developing country?
- A. long lifespan
- B. low birth rate
- C. low death rate
- D. short lifespan
An example of a filter -feeding animal is
- A. shark
- B. butterfly
- C. whale
- D. mosquito
In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained
Weight of the evaporating basin alone = 80.5g
Weight of basin and soil = 101.5g
Weight after drying the soil in the oven = 99.0g
Weight of basin and roasted soil = 95.5g
The percentage of humus in the soil sample is
- A. 16.7%
- B. 17.6%
- C. 26.7%
- D. 16.2%
In nature, plants and animals are perpetually engaged in mutualism because
- A. they are rivals
- B. all animals rely on food produced by plants
- C. they utilize respiratory wastes of each other
- D. they are neighbours
The type of asexual reproduction that is common to both Paramecium and protists is
- A. budding
- B. sporulation
- C. fragmentation
- D. fission
The sequence of the one-way gaseous exchange mechanism in a fish is
- A. operculum → gills → mouth
- B. gills → operculum → mouth
- C. mouth → operculum → gils
- D. mouth → gills → operculum
Which of the following organs regulates the levels of water, salts , hydrogen ions and urea in the mammalian blood?
- A. Liver
- B. Kidney
- C. Bladder
- D. Colon
The vascular tissues in higher plants are responsible for
- A. the movement of food and water
- B. suction pressure
- C. transpiration pull
- D. the transport of gases and water
The movement response of a cockroach away from a light source can be described as
- A. positive phototaxism
- B. negative phototaxism
- C. negative phototropism
- D. positive phototropism
The path followed by air as it passes through the lungs in mammals is
- A. trachea → bronchi → bronchioles → alveoli
- B. bronchi → trachea → alveoli → bronchioles
- C. trachea → bronchioles → alveoli
- D. bronchioles → alveoli → bronchi →trachea
The part of the mammalian ear responsible for the maintenance of balance is the
- A. cochlea
- B. pinna
- C. perilymph
- D. vestibular system
Use the following information to answer the question below.
I. Test tube containing cane sugar and water . ll. Test tube containing cane sugar and diluted acid. III. Test tube containing cane sugar and its degrading enzyme .
The enzyme involved in the hydrolysis is
- A. rennin
- B. erepsin
- C. sucrase
- D. maltase
Use the following information to answer the question below.
I. Test tube containing cane sugar and water . ll. Test tube containing cane sugar and diluted acid. III. Test tube containing cane sugar and its degrading enzyme .
In which of the test tubes will glucose be detected after complete hydrolysis?
- A. l and ll only
- B. ll and lll only
- C. l only
- D. l, ll and lll
I. Parasitism → Sundew. ll. Autotrophism →Amoeba. III. Saprophytism → Alga. IV Heterotrophism → Agama.
Which of the above modes of nutrition is correctly matched with the organism that exhibits it?
- A. ll
- B. lll
- C. lV
- D. l
In mammals, the exchange of nutrients and metabolic products occurs in the
- A. lungs
- B. oesophagus
- C. trachea
- D. lymph
The ability of living organism to detect and respond to changes in the environment is referred to as
- A. locomotion
- B. irritability
- C. growth
- D. taxis
The conversion of a nutrient into a molecule in the body of a consumer is referred to as
- A. digestion
- B. assimilation
- C. absorption
- D. inhibition
Which of the following is true of leucocytes?
- A. they are respiratory pigments
- B. they are most numerous and ramify all cells
- C. they are large and nucleated
- D. they are involved in blood clotting