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A potometer with a leafy shoot weighed 18.9g initially and weighed 17.9g after one hour....

Biology
JAMB 1978

A potometer with a leafy shoot weighed 18.9g initially and weighed 17.9g after one hour. From this it follow that

  • A. the shoot absorbed 1g of water per hour
  • B. 1g of water per hour evaporates from the potometer
  • C. the shoot lost 1g of water per hour
  • D. the potometer water receded at the rate of 1g per hour
  • E. the shoot was respiring and lost weight at rate of 1g per hour
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Correct Answer: Option C
Explanation

The amount of water lost is (18.9 - 17.9)g = 1g. Hence, the water lost by the shoot is 1g.

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post UTME Past Questions Agent