Biology, 2009, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2009

Title :

Biology

Exam :

JAMB Exam

Paper 1 | Objectives

31 - 40 of 50 Questions

#	Question	Ans
31.	A health condition that is known to have resulted from gene mutation is? A. typhoid B. rabies C. sickle-cell anaemia D. sleeping sickness Show Content Detailed Solution There is an explanation video available below.	C
32.	Plants that grow in an area that is neither too wet nor too dry are A. xerophytes B. mesophytes C. epiphytes D. hydrophytes Show Content Detailed Solution There is an explanation video available below.	B
33.	The part of a domestic fowl responsible for preventing heat loss is the? A. filoplume B. contour feather C. down feather D. quill Show Content Detailed Solution DOWN FEATHERS ARE THOSE WHICH HELP TO KEEP THE BIRDS'S BODY WARM. THEY ARE SOFT AND FLUFFY, FOUND ON THE INNER SIDE OF BIRD'S BODY . There is an explanation video available below.	C
34.	Which of the following animals is most adapted for water conservation? A. earthworms B. mammals C. flatworms D. insects Show Content Detailed Solution Insects are widespread and adapted to all types of environment even the driest and hottest places on earth. There is an explanation video available below.	D
35.	The specialized pigment cells that are involved in colouration and colour change in animals? A. xanthophyll B. chromatophores C. chlorophyll D. melanin Show Content Detailed Solution Chromatophores are cells that produce color, of which many types are pigment-containing cells, or groups of cells, found in a wide range of animals including amphibians, fish, reptiles, crustaceans and cephalopods. Mammals and birds, in contrast, have a class of cells called melanocytes for coloration. There is an explanation video available below.	B
36.	During the dry season in the tropics, the body metabolism of some animals slow to a minimal level in a process referred to as? A. hibernation B. aestivation C. dormancy D. senescense Show Content Detailed Solution Aestivation is characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid conditions. It takes place during times of heat and dryness, the hot dry season, which are often the summer months. There is an explanation video available below.	B
37.	According to Darwin, the driving force behind evolutionary change is A. natural selection B. genetic drift C. mutation D. gene flow Show Content Detailed Solution There is an explanation video available below.	A
38.	Use the diagram above to answer this question. The structure that controls loss of water vapour during transpiration is labelled A. l B. ll C. lll D. lV Show Content Detailed Solution Stomata regulate gas exchange between the plant and environment and control of water loss by changing the size of the stomatal pore. Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. There is an explanation video available below.	D
39.	Use the diagram above to answer this question. The part labelled l is the A. spongy mesophyll B. upper epidemis C. cuticle D. vein Show Content Detailed Solution Plant cuticle is the outermost layer of plants, which covers leaves, fruits, flowers, and non-woody stems of higher plants. It protects plants against drought, extreme temperatures, UV radiation, chemical attack, mechanical injuries, and pathogen/pest infection. There is an explanation video available below.	C
40.	Use the diagram above to answer this question. Emulsification of fats takes place in the part labelled? A. l B. ll C. lll D. lV Show Content Detailed Solution Fat emulsification is the process of increasing the surface area of fats in the small intestine by grouping them into small clusters. This is the responsibility of bile, a liquid created by the liver and stored in the gallbladder. Actual digestion of the fats is then accomplished by lipase, an enzyme from the pancreas There is an explanation video available below.	D

31.	A health condition that is known to have resulted from gene mutation is? A. typhoid B. rabies C. sickle-cell anaemia D. sleeping sickness Show Content Detailed Solution There is an explanation video available below.	C
32.	Plants that grow in an area that is neither too wet nor too dry are A. xerophytes B. mesophytes C. epiphytes D. hydrophytes Show Content Detailed Solution There is an explanation video available below.	B
33.	The part of a domestic fowl responsible for preventing heat loss is the? A. filoplume B. contour feather C. down feather D. quill Show Content Detailed Solution DOWN FEATHERS ARE THOSE WHICH HELP TO KEEP THE BIRDS'S BODY WARM. THEY ARE SOFT AND FLUFFY, FOUND ON THE INNER SIDE OF BIRD'S BODY . There is an explanation video available below.	C
34.	Which of the following animals is most adapted for water conservation? A. earthworms B. mammals C. flatworms D. insects Show Content Detailed Solution Insects are widespread and adapted to all types of environment even the driest and hottest places on earth. There is an explanation video available below.	D
35.	The specialized pigment cells that are involved in colouration and colour change in animals? A. xanthophyll B. chromatophores C. chlorophyll D. melanin Show Content Detailed Solution Chromatophores are cells that produce color, of which many types are pigment-containing cells, or groups of cells, found in a wide range of animals including amphibians, fish, reptiles, crustaceans and cephalopods. Mammals and birds, in contrast, have a class of cells called melanocytes for coloration. There is an explanation video available below.	B

36.	During the dry season in the tropics, the body metabolism of some animals slow to a minimal level in a process referred to as? A. hibernation B. aestivation C. dormancy D. senescense Show Content Detailed Solution Aestivation is characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid conditions. It takes place during times of heat and dryness, the hot dry season, which are often the summer months. There is an explanation video available below.	B
37.	According to Darwin, the driving force behind evolutionary change is A. natural selection B. genetic drift C. mutation D. gene flow Show Content Detailed Solution There is an explanation video available below.	A
38.	Use the diagram above to answer this question. The structure that controls loss of water vapour during transpiration is labelled A. l B. ll C. lll D. lV Show Content Detailed Solution Stomata regulate gas exchange between the plant and environment and control of water loss by changing the size of the stomatal pore. Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. There is an explanation video available below.	D
39.	Use the diagram above to answer this question. The part labelled l is the A. spongy mesophyll B. upper epidemis C. cuticle D. vein Show Content Detailed Solution Plant cuticle is the outermost layer of plants, which covers leaves, fruits, flowers, and non-woody stems of higher plants. It protects plants against drought, extreme temperatures, UV radiation, chemical attack, mechanical injuries, and pathogen/pest infection. There is an explanation video available below.	C
40.	Use the diagram above to answer this question. Emulsification of fats takes place in the part labelled? A. l B. ll C. lll D. lV Show Content Detailed Solution Fat emulsification is the process of increasing the surface area of fats in the small intestine by grouping them into small clusters. This is the responsibility of bile, a liquid created by the liver and stored in the gallbladder. Actual digestion of the fats is then accomplished by lipase, an enzyme from the pancreas There is an explanation video available below.	D