Biology, 2019, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2019

Title :

Biology

Exam :

JAMB Exam

Paper 1 | Objectives

41 - 50 of 80 Questions

#	Question	Ans
41.	Only specially adapted micro-organisms are found in A. Salty water B. Humid air C. Moist soil D. Mouth cavities Show Content Detailed Solution Halophiles are organisms that thrive in high salt concentrations. The adaptations of halophile organisms to their environment are: (a) The integrity of non-halophile macromolecules is compromised, and the flow of water out of the cell produces a Turgor effect. • (b) Moderate halophiles maintain their structures via the synthesis of compatible organic solutes. • (c) Extreme halophiles maintain their structures via equilibration of cellular and environmental salt concentrations. There is an explanation video available below.	A
42.	Plants which can survive in extremely dry places are called A. Mesophytes B. Xerophytes C. Hydrophytes D. Angiosperms Show Content Detailed Solution They are called Xerophyte because they are species of plant that has adaptations/adaptive features like waxy cuticles which enables them to survive in extremely dry land. There is an explanation video available below.	B
43.	The presence of ______ for swimming in a tad-pole enables it to adapt in an aquatic habitat. A. Gills B. Swim bladder C. Tail D. Fins Show Content Detailed Solution Tadpole's ability to swim and adapt to an aquatic habitat is due to the presence of its tail. There is an explanation video available below.	C
44.	Possession of thin membrane enables a tapeworm to A. Fasten themselves to the wall of the host's intestine B. Lay numerous eggs C. Absorb digested food from the host's intestine to their system D. Shield themselves inside the host's intestine with anti-enzymes in order to avoid being digested Show Content Detailed Solution The tapeworm possesses a thin membrane mostly because of it absorption of digested food from the intestine of the host. There is an explanation video available below.	C
45.	Which of the following juices contains the enzyme ptyalin? A. Gastric juice B. Succus C. Pancreatic juice D. Saliva Show Content Detailed Solution The saliva contains an enzyme called ptyalin which helps to hydrolysis of starch to maltose partially There is an explanation video available below.	D
46.	Which of the following essential substance is contained in vegetable? A. Chlorophyll B. Glucose C. Mineral Salts D. Carbon dioxide Show Content Detailed Solution Vegetable contains mineral salts like magnesium, copper etc which is very essential for body growth. There is an explanation video available below.	C
47.	Good quality food will perform the following functions in human except A. Supplying energy B. Providing resistance against malaria C. Maintaining health D. Sustaining growth Show Content Detailed Solution Good quality food cannot provide resistance to malaria because it does not contain anti-malaria substance it only and good propr growth. There is an explanation video available below.	B
48.	Which of the following is considered to be the first product of Photosynthesis? A. Protein B. Starch C. Energised Chlorophyll D. Hydroxyl ions Show Content Detailed Solution Starch is the main and first product formed during photosynthesis because the simple sugar formed is partly used by the plant and excess of it is converted into starch immediately for storage and the starch is transported to other parts of the plant through the phloem vessels for storage. There is an explanation video available below.	B
49.	Which of the blood corpusles are irregular and amoeloid in shape A. Leucocytes B. Erythrocytes C. Thrombocytes D. Plasma Show Content Detailed Solution Leucocytes are also called white blood cell. They are irregular and amoebaoid in shape. There is an explanation video available below.	A
50.	Which organ removes the largest quantity of water from the blood? A. Lung B. Skin C. Kidney D. Intestine Show Content Detailed Solution Kidney is an organ that perform lots of function one of which it helps in removing large quantity of water from the blood in order to maintain normal balance in the body system There is an explanation video available below.	C

41.	Only specially adapted micro-organisms are found in A. Salty water B. Humid air C. Moist soil D. Mouth cavities Show Content Detailed Solution Halophiles are organisms that thrive in high salt concentrations. The adaptations of halophile organisms to their environment are: (a) The integrity of non-halophile macromolecules is compromised, and the flow of water out of the cell produces a Turgor effect. • (b) Moderate halophiles maintain their structures via the synthesis of compatible organic solutes. • (c) Extreme halophiles maintain their structures via equilibration of cellular and environmental salt concentrations. There is an explanation video available below.	A
42.	Plants which can survive in extremely dry places are called A. Mesophytes B. Xerophytes C. Hydrophytes D. Angiosperms Show Content Detailed Solution They are called Xerophyte because they are species of plant that has adaptations/adaptive features like waxy cuticles which enables them to survive in extremely dry land. There is an explanation video available below.	B
43.	The presence of ______ for swimming in a tad-pole enables it to adapt in an aquatic habitat. A. Gills B. Swim bladder C. Tail D. Fins Show Content Detailed Solution Tadpole's ability to swim and adapt to an aquatic habitat is due to the presence of its tail. There is an explanation video available below.	C
44.	Possession of thin membrane enables a tapeworm to A. Fasten themselves to the wall of the host's intestine B. Lay numerous eggs C. Absorb digested food from the host's intestine to their system D. Shield themselves inside the host's intestine with anti-enzymes in order to avoid being digested Show Content Detailed Solution The tapeworm possesses a thin membrane mostly because of it absorption of digested food from the intestine of the host. There is an explanation video available below.	C
45.	Which of the following juices contains the enzyme ptyalin? A. Gastric juice B. Succus C. Pancreatic juice D. Saliva Show Content Detailed Solution The saliva contains an enzyme called ptyalin which helps to hydrolysis of starch to maltose partially There is an explanation video available below.	D

46.	Which of the following essential substance is contained in vegetable? A. Chlorophyll B. Glucose C. Mineral Salts D. Carbon dioxide Show Content Detailed Solution Vegetable contains mineral salts like magnesium, copper etc which is very essential for body growth. There is an explanation video available below.	C
47.	Good quality food will perform the following functions in human except A. Supplying energy B. Providing resistance against malaria C. Maintaining health D. Sustaining growth Show Content Detailed Solution Good quality food cannot provide resistance to malaria because it does not contain anti-malaria substance it only and good propr growth. There is an explanation video available below.	B
48.	Which of the following is considered to be the first product of Photosynthesis? A. Protein B. Starch C. Energised Chlorophyll D. Hydroxyl ions Show Content Detailed Solution Starch is the main and first product formed during photosynthesis because the simple sugar formed is partly used by the plant and excess of it is converted into starch immediately for storage and the starch is transported to other parts of the plant through the phloem vessels for storage. There is an explanation video available below.	B
49.	Which of the blood corpusles are irregular and amoeloid in shape A. Leucocytes B. Erythrocytes C. Thrombocytes D. Plasma Show Content Detailed Solution Leucocytes are also called white blood cell. They are irregular and amoebaoid in shape. There is an explanation video available below.	A
50.	Which organ removes the largest quantity of water from the blood? A. Lung B. Skin C. Kidney D. Intestine Show Content Detailed Solution Kidney is an organ that perform lots of function one of which it helps in removing large quantity of water from the blood in order to maintain normal balance in the body system There is an explanation video available below.	C

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