Biology, 2010, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2010

Title :

Biology

Exam :

JAMB Exam

Paper 1 | Objectives

21 - 30 of 49 Questions

#	Question	Ans
21.	A food chain always begins with a? A. consumer B. decomposer C. producer D. primary consumer Show Content Detailed Solution There is an explanation video available below.	C
22.	Mycorrhiza promote plant growth by? A. absorbing inorganic ions from the soil B. protecting it from infection C. helping it to utilize atmospheric nitrogen D. serving as a growth regulator Show Content Detailed Solution Mycorrhizal fungi allow plants to draw more nutrients and water from the soil. They also increase plant tolerance to different environmental stresses There is an explanation video available below.	A
23.	The barrier between maternal and fetal blood is the? A. placenta B. liver C. umbilical cord D. uterine wall Show Content Detailed Solution There is an explanation video available below.	A
24.	The blood component that has the greatest affinity for oxygen is the? A. lymphocytes B. leucocytes C. erythrocytes D. thrombocytes Show Content Detailed Solution There is an explanation video available below.	C
25.	Which of the following organisms is mainly found in the marine habitat? A. Achatina B. Tilapia C. Dog fish D. Tortoise Show Content Detailed Solution Dogfish are types of sharks that are common tropical open sea fishes, with others like mackerel, sea catfish, etc. There is an explanation video available below.	C
26.	The two halves of the pelvic girdle are joined together at the? A. pubic symphysis B. ilium C. pubis D. obturator foramen Show Content Detailed Solution The pubic symphysis is found on the anterior side of the pelvis and is the anterior boundary of the perineum. The pubic bones form a cartilaginous joint in the median plane, the symphysis pubis. The joint keeps the two bones of the pelvis together and steady during activity. There is an explanation video available below.	A
27.	I. Adoption of appropriate nocturnal habits ll. Burrowing lll. Adjusting their internal body temperature. IV Possession of many sweat pores. Which of the above are ways in which desert animals adapt to extreme heat of the environment? A. I and IV only B. ll and lll only C. l and ll only D. l, ll and lll only Show Content Detailed Solution III & IV are considered invalid because some desert animals are poikilotherm. Poikilotherm or cold blooded animals are the animals (without sweat pores) whose body temperature vary with the temperature of the environment. e.g Amphibians and reptiles are poikilothermic animals. There is an explanation video available below.	C
28.	Low annual rainfall, sparse vegetation , high diurnal temperatures and cold nights are characteristic features of the? A. tropical rainforest B. desert C. montane forest D. guinea savanna Show Content Detailed Solution There is an explanation video available below.	B
29.	The activity of an organism which affects the survival of another organism in the same habitat constitutes? A. an edaphic factor B. an abiotic factor C. a biotic factor D. a physiographic factor Show Content Detailed Solution There is an explanation video available below.	C
30.	The average number of individuals of a species per unit area of the habitat is the? A. population density B. population frequency C. population size D. population distribution Show Content Detailed Solution There is an explanation video available below.	A

21.	A food chain always begins with a? A. consumer B. decomposer C. producer D. primary consumer Show Content Detailed Solution There is an explanation video available below.	C
22.	Mycorrhiza promote plant growth by? A. absorbing inorganic ions from the soil B. protecting it from infection C. helping it to utilize atmospheric nitrogen D. serving as a growth regulator Show Content Detailed Solution Mycorrhizal fungi allow plants to draw more nutrients and water from the soil. They also increase plant tolerance to different environmental stresses There is an explanation video available below.	A
23.	The barrier between maternal and fetal blood is the? A. placenta B. liver C. umbilical cord D. uterine wall Show Content Detailed Solution There is an explanation video available below.	A
24.	The blood component that has the greatest affinity for oxygen is the? A. lymphocytes B. leucocytes C. erythrocytes D. thrombocytes Show Content Detailed Solution There is an explanation video available below.	C
25.	Which of the following organisms is mainly found in the marine habitat? A. Achatina B. Tilapia C. Dog fish D. Tortoise Show Content Detailed Solution Dogfish are types of sharks that are common tropical open sea fishes, with others like mackerel, sea catfish, etc. There is an explanation video available below.	C

26.	The two halves of the pelvic girdle are joined together at the? A. pubic symphysis B. ilium C. pubis D. obturator foramen Show Content Detailed Solution The pubic symphysis is found on the anterior side of the pelvis and is the anterior boundary of the perineum. The pubic bones form a cartilaginous joint in the median plane, the symphysis pubis. The joint keeps the two bones of the pelvis together and steady during activity. There is an explanation video available below.	A
27.	I. Adoption of appropriate nocturnal habits ll. Burrowing lll. Adjusting their internal body temperature. IV Possession of many sweat pores. Which of the above are ways in which desert animals adapt to extreme heat of the environment? A. I and IV only B. ll and lll only C. l and ll only D. l, ll and lll only Show Content Detailed Solution III & IV are considered invalid because some desert animals are poikilotherm. Poikilotherm or cold blooded animals are the animals (without sweat pores) whose body temperature vary with the temperature of the environment. e.g Amphibians and reptiles are poikilothermic animals. There is an explanation video available below.	C
28.	Low annual rainfall, sparse vegetation , high diurnal temperatures and cold nights are characteristic features of the? A. tropical rainforest B. desert C. montane forest D. guinea savanna Show Content Detailed Solution There is an explanation video available below.	B
29.	The activity of an organism which affects the survival of another organism in the same habitat constitutes? A. an edaphic factor B. an abiotic factor C. a biotic factor D. a physiographic factor Show Content Detailed Solution There is an explanation video available below.	C
30.	The average number of individuals of a species per unit area of the habitat is the? A. population density B. population frequency C. population size D. population distribution Show Content Detailed Solution There is an explanation video available below.	A