Which of the following is the direct consequence of transferring energy from one trophic level to another?
- A. An increase in biomass
- B. A decrease in the efficiency
- C. An increase in the total numbers of resulting individuals
- D. A decrease in the resulting biomass
A group of organisms of different species living in a particular area is described as a
- A. colony
- B. community
- C. population
- D. niche
The small masses of nervous tissues in which many neurones have their nuclei are called
- A. dorsal roots
- B. ventral roots
- C. ganglia
- D. synapses
The outermost embryonic membrane in the mammal is the
- A. amnion
- B. chorion
- C. allantois
- D. yolk sac
A dry fruit formed from two or more carpels containing several seeds is a
- A. follicle
- B. legume
- C. capsule
- D. schizocarp
The most reliable estimate of growth is by measuring changes in
- A. length
- B. volume
- C. surface area
- D. dry weight
The ovary represented is
- A. half-superior
- B. inferior
- C. superior
- D. half-inferior
Which of the following is not a function of the mammalian skeleton?
- A. Protection
- B. respiration
- C. Transportation
- D. Support
In which of the following groups of animals is the malpighian tubule found?
- A. Lizards, snakes and frogs
- B. Crickets, houseflies and grasshoppers
- C. Millipedes, centipedes and scorpions
- D. earthworms, roundworms and flatworms
Which of following movements occur during exhalation?
- A. The diaphragm and intercostal muscles relax
- B. The thoracic cavity increases in volume
- C. The diaphragm and intercostal muscles contract
- D. The diaphragm contracts and the intercostal muscle relax
In adult mammalian blood, the cells which lack nuclei are the
- A. erythrocytes
- B. lymphocytes
- C. leucocytes
- D. phagocytes
The heart of the adult frog consist of
- A. two auricles and two ventricles
- B. one auricle and one ventricle
- C. two ventricle and one auricle
- D. one ventricle and two auricles
Unicellular organisms transport essential nutrients directly to all parts of their bodies by the process of diffusion because, they have
- A. a large volume of surface area ratio
- B. a large surface area to volume ratio
- C. their bodies immersed in the nutrients
- D. their outer membrane made of cellulose
Regulation of blood sugar level takes place in the
- A. pancreas
- B. iluem
- C. liver
- D. kidney
In million’s test, when the reagent is added to a protein food item, a white precipitate is produced which turns
- A. blue on heating
- B. yellow on heating
- C. green on heating
- D. red on heating
In a water culture experiment, a plant showed poor growth and yellowing of the leaves. These may be due to deficiency in
- A. copper
- B. iron
- C. magnesium
- D. calcium
The manufacture of carbohydrates by plants takes place only in
- A. the leaves
- B. the green stems
- C. chlorophyllous parts
- D. flowering plants
Which of the following structures is capable of producing more tissues in the stem of a herbaceous flowering plant?
- A. Epidermis
- B. Pericycle
- C. Xylem
- D. Cambium
A distinguished feature of mammals is the possession of
- A. skin
- B. scale
- C. nail
- D. hair
The structure that prevents food particle from escaping through the fish gills are called gill
- A. arches
- B. filaments
- C. rakers
- D. lamellae