Biology, 2018, WASSCE/WAEC MAY/JUNE, Exam, Paper 1 | Objectives

Paper Info

Year :

2018

Title :

Biology

Exam :

WASSCE/WAEC MAY/JUNE

Paper 1 | Objectives

11 - 20 of 49 Questions

#	Question	Ans
11.	Which of the following structures would carry out cellular respiration? A A. germinating seed B. decolorised leaf C. dry leaf D. boiled cowpea Show Content Detailed Solution Germinating seeds respire by using oxygen and producing carbon dioxide gas, they respire in the similar way as animals.	A
12.	Which of the following is NOT an excretory product of animals? A. carbondioxide B. urea C. sweat D. oxygen Show Content Detailed Solution Animals take in oxygen in respiratory process, taking out carbondioxide.	D
13.	An example of homeostasis in living organisms is A. cooling effect resulting from evaporation of water from the body surface B. root hairs of a plant growing towards the source of light C. changing of the body colour of chameleon to match the colour of the foliage on which it is resting D. the release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil Show Content Detailed Solution Homeostasis is a living organism's way of maintaining a stable internal environment even in the event of external environmental changes. When the plant keeps supplying phosphorus to the phloem even in the case of a deficiency in the soil, it maintains a steady balance on its inside irrespective of the lack in the soil.	D
14.	Ultrafiltration in the kidney takes place in the A. Renal vein B. Medulla C. Loop of Henle D. Bowman's Capsule Show Content Detailed Solution The fine structure of the glomerulus and Bowman’s capsule facilitate ultrafiltration. It is the non-specific filtration of the blood under high pressure and occurs in the Bowman’s capsule of the nephron.	D
15.	The thyroid gland is found at the base of the A. Midbrain B. Kidney C. Neck D. Liver Show Content Detailed Solution The thyroid gland is an endocrine gland located at the base of the neck.	C
16.	Which of the following statements about the response of neurones to stimulus is correct? A. Neurons respond to stimulus of any strength B. Neurons respond to all stimuli applied in rapid succession C. Neurons respond more rapidly during the absolute refraction period D. Intensity of stimulus must reach a threshold value before the neurons can be excited Show Content Detailed Solution Each neuron has a threshold that must be met before an action potential travels the length of the neurons axon. In other words, the neurons don't just begin to act immediately, there is a threshold value where the intensity of the stimulus must get to in order to yield a response from the neuron. This is why you can consciously pinch your self and not feel anything serious but when it is unconscious, it gives you serious pain.	D
17.	Which of the following practices may lead to infection of the eye? Use of A. contact lenses B. convex lenses C. biconcave lenses D. concave lenses Show Content Detailed Solution Contact lenses have a way of causing infections to the eyes at some point. It can cause a lack of oxygen since they are worn directly in the eye, especially if worn for long periods at a stretch.	A
18.	The structures for gaseous exchange in breathing roots are A. stomata B. lenticels C. cuticle D. mitochondria Show Content Detailed Solution Breathing roots, also known as pneumatophores, have portions of the root which grow upward until they project some centimetres above the low-tide level. They have small openings called lenticels in their bark so that air can reach the rest of the plant’s root system.	B
19.	The diagram above is an illustration of the life cycle of an insect. The adult fly in this cycle is called A. Housefly B. Butterfly C. Cockroach D. Mosquito Show Content Detailed Solution From the diagram, the larva is a caterpillar, hence, the adult is called a Butterfly.	B
20.	In the diagram above, the larva is also known as A. Nymph B. Caterpillar C. Maggot D. Chrysalis Show Content Detailed Solution The diagram is the life cycle of a butterfly whose larva is called Caterpillar.	B

11.	Which of the following structures would carry out cellular respiration? A A. germinating seed B. decolorised leaf C. dry leaf D. boiled cowpea Show Content Detailed Solution Germinating seeds respire by using oxygen and producing carbon dioxide gas, they respire in the similar way as animals.	A
12.	Which of the following is NOT an excretory product of animals? A. carbondioxide B. urea C. sweat D. oxygen Show Content Detailed Solution Animals take in oxygen in respiratory process, taking out carbondioxide.	D
13.	An example of homeostasis in living organisms is A. cooling effect resulting from evaporation of water from the body surface B. root hairs of a plant growing towards the source of light C. changing of the body colour of chameleon to match the colour of the foliage on which it is resting D. the release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil Show Content Detailed Solution Homeostasis is a living organism's way of maintaining a stable internal environment even in the event of external environmental changes. When the plant keeps supplying phosphorus to the phloem even in the case of a deficiency in the soil, it maintains a steady balance on its inside irrespective of the lack in the soil.	D
14.	Ultrafiltration in the kidney takes place in the A. Renal vein B. Medulla C. Loop of Henle D. Bowman's Capsule Show Content Detailed Solution The fine structure of the glomerulus and Bowman’s capsule facilitate ultrafiltration. It is the non-specific filtration of the blood under high pressure and occurs in the Bowman’s capsule of the nephron.	D
15.	The thyroid gland is found at the base of the A. Midbrain B. Kidney C. Neck D. Liver Show Content Detailed Solution The thyroid gland is an endocrine gland located at the base of the neck.	C

16.	Which of the following statements about the response of neurones to stimulus is correct? A. Neurons respond to stimulus of any strength B. Neurons respond to all stimuli applied in rapid succession C. Neurons respond more rapidly during the absolute refraction period D. Intensity of stimulus must reach a threshold value before the neurons can be excited Show Content Detailed Solution Each neuron has a threshold that must be met before an action potential travels the length of the neurons axon. In other words, the neurons don't just begin to act immediately, there is a threshold value where the intensity of the stimulus must get to in order to yield a response from the neuron. This is why you can consciously pinch your self and not feel anything serious but when it is unconscious, it gives you serious pain.	D
17.	Which of the following practices may lead to infection of the eye? Use of A. contact lenses B. convex lenses C. biconcave lenses D. concave lenses Show Content Detailed Solution Contact lenses have a way of causing infections to the eyes at some point. It can cause a lack of oxygen since they are worn directly in the eye, especially if worn for long periods at a stretch.	A
18.	The structures for gaseous exchange in breathing roots are A. stomata B. lenticels C. cuticle D. mitochondria Show Content Detailed Solution Breathing roots, also known as pneumatophores, have portions of the root which grow upward until they project some centimetres above the low-tide level. They have small openings called lenticels in their bark so that air can reach the rest of the plant’s root system.	B
19.	The diagram above is an illustration of the life cycle of an insect. The adult fly in this cycle is called A. Housefly B. Butterfly C. Cockroach D. Mosquito Show Content Detailed Solution From the diagram, the larva is a caterpillar, hence, the adult is called a Butterfly.	B
20.	In the diagram above, the larva is also known as A. Nymph B. Caterpillar C. Maggot D. Chrysalis Show Content Detailed Solution The diagram is the life cycle of a butterfly whose larva is called Caterpillar.	B