Study the diagram of a food chain shown and use; it to answer the question.
P —> Q —> R —> S —> T
The organism designated P in the food chain above is normally sustained by energy from
- A. sunlight
- B. carbohydrates
- C. green plants
- D. mineral salts
Which of the following organisms is a primary consumer?
- A. dog
- B. sheep
- C. grass
- D. fungus
Which of the following statements is true about sandy soil?
- A. has limited air space
- B. is light and easy to dig
- C. drains slowly
- D. is heavy and poorly aerated
Which of the following instruments is used to estimate the number of plants in a habitat?
- A. pooter
- B. pitfall trap
- C. quadrant
- D. sweep net
What is the critical limiting factor for plants below the photic zone in an aquatic ecosystem?
- A. availability of nutrients
- B. availability of water
- C. intensity of light
- D. carbon dioxide concentration
Which of the following cycles involves the process of precipitation and transpiration?
- A. water cycles
- B. carbon cycle
- C. nitrogen cycle
- D. oxygen cycle
Which of the following processes removes carbon from the atmosphere?
- A. putrefaction
- B. photosynthesis
- C. volcanic eruption
- D. burning of fuels
A seed of a flowering plant can best be described as
- A. radicle and plumule
- B. the developed ovule
- C. the embryo and endosperm
- D. developed ovary
Spectacles with convex lenses correct long-sightedness by
- A. converging the light rays before they enter the eye
- B. diverging the light rays before they enter the eye
- C. reducing the light intensity before it enters the eye
- D. increasing the light intensity before it enters the eye
The part of the ear which contains nerve cells sensitive to sound vibrations is the
- A. cochlea
- B. ampulla
- C. tympanum
- D. malleus
The reason why hospitals use saline solutions as drip Instead of water is
- A. because salt is a preservative
- B. to prevent contamination of the body
- C. to maintain the composition of body fluids
- D. to increase the number of blood cells
The graph above shows the results of a laboratory investigation which measured the body temperatures of a lizard and a bird under changing artificial conditions. Use it to answer the question.
What physiological term can used to describe the regulation of the body temperature of the of the Lizard?
- A. Homeostasis
- B. Homoithermy
- C. Poikilothermy
- D. Osmoregulation
The graph below shows the results of a laboratory investigation which measured the body temperatures of a lizard and a bird under changing artificial conditions. Use it to answer the question.
Which of the statements below is valid?
- A. The bird's blood was always warmer than that of the lizard
- B. The body temperature of the bird varied less than that of the lizard during changes in environmental temperature
- C. The body temperature of the bird remained constant despite changes in environmental temperature
- D. The body temperature of the lizard was always close to that of the environmental temperature
Which of the following features is not a characteristic of arteries? Arteries
- A. possess valves at internals throughout their length
- B. have thick muscular and elastic walls
- C. carry blood away from the heart
- D. transport oxygenated blood with the exception of the pulmonary artery
Which of the following groups of organisms has kidney as the excretory organ?
- A. Fishes, amphibians, birds, man
- B. Fishes, amphibians, annelids, insects
- C. Fishes, reptiles, birds, tapeworm
- D. Fishes, protozoans, amphibians, man
The reason why the flow of blood through the capillaries is very slow is
- A. because the walls of Capillaries are very thick
- B. to avoid high blood pressure
- C. to ensure that the individual does not get dizzy
- D. Their large numbers and one cell-thick walls enables them to provide a large surface area through which materials can be exchanged between the blood and the body cells.
Which of the following structures is not a skeletal material?
- A. Chitin
- B. Cartilage
- C. Bone
- D. Muscle
The longest bone in the body is the
- A. humerous
- B. femur
- C. scapula
- D. tibia
The overall reaction in glycolysis can be summarised as
- A. C\(_{6}\)H\(_{12}\)O\(_{6}\) -----> C\(_{3}\)H\(_{4}\)O\(_{3}\) + 4H + ATP
- B. C\(_{6}\)H\(_{12}\)O\(_{6}\) -----> 2C\(_{3}\)H\(_{4}\)O\(_{3}\) + 4H + 2ATP
- C. C\(_{6}\)H\(_{12}\)O\(_{6}\) -----> 2C\(_{3}\)H\(_{4}\)O\(_{3}\) + 4H + ADP
- D. C\(_{6}\)H\(_{12}\)O\(_{6}\) -----> 2C\(_{3}\)H\(_{4}\)O\(_{3}\) + 4H + 2ADP
The curvature movement of plants in response to the stimulus of water is called
- A. hydrotropism
- B. geotropism
- C. Phototropism
- D. thigmotropism
Red blood cells were found to have burst open after being placed in distill for an hour. This phenomenon is known as
- A. plasmolysis
- B. diffusion
- C. haemolysis
- D. wilting