Biology is the study of life and living things. It can be divided into different areas that look at the structure, function, anatomy, and behavior of organisms.
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Question 451:
Given the equation:
6CO2 + 6H2O → C6H12O6 + 6O2 {Under sunlight & Chlorophyll)
The oxygen given off during the above process is derived from
Options:
A) sunlight
B) chlorophyll
C) carbon dioxide
D) atmosphere
E) water
Show Answer
The correct answer is E .
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Question 452: The primary structure responsible for pumping blood for circulation through the mammalian circulatory systems is the
Options:
A) veins
B) right auricle
C) arteries
D) left ventricle
Show Answer
The correct answer is D .
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Question 453:
Total salt content in blood is about
Options:
A) 1.85 to 1.9%
B) 11.85 to 11.9%
C) 2.85 to 2.9%
D) 0.85 to 0.9%
Show Answer
The correct answer is D .
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Question 454: The fins making up the limbs of the bony fish are
Options:
A) caudal and ventral
B) ventra and pelvic
C) pelvic and pectoral
D) pectoral and dorsal
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The correct answer is C .
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Question 455: The beak of a duck is structurally adapted for
Options:
A) scooping and sieving food
B) catching and grasping food
C) picking and cracking food
D) boring and sucking food
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The correct answer is A .
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Question 456: The highest percentage of energy in an ecosystem occurs at the level of the
Options:
A) secondary consumer
B) decomposers
C) producers
D) primary consumers
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The correct answer is C .
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Question 457: The function of the loop of Henle is to
Options:
A) increase the flow of urine
B) concentrate amino acids in the kidney tissue
C) concentrate sodium chloride in the medulla of the kidney
D) increase the volume of urine
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The correct answer is C .
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Question 458: After a heavy rainfall and the formation of a large pond, the most likely sequence of changes in the vegetation of the pond is
Options:
A) Euglena → water lily → Spirogyra → grass
B) water lily → Spirogyra →grass → Euglena
C) Spirogyra → Euglena → grass → water lily
D) Euglena → Spirogyra → water lily → grass
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The correct answer is C .
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Question 459: Epiphytes growing on the branches of trees provide an example of the relationship known as
Options:
A) parasitism
B) commensalism
C) saprophytism
D) holophytism
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The correct answer is B .
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Question 460:
De-oxygenated blood is transported to the lungs through the
Options:
A) renal vein
B) hepatic portal vein
C) pulmonary artery
D) pulmonary vein
Show Answer
The correct answer is C .