Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
17.7k views
in Biology by (54.6k points)

Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.

(a) Name the phenomenon being demonstrated.

(b) what is the purpose of putting oil the test tube?

(c) Would it make a difference if the experimental set – up is kept in bright sunshine?

(d) what is the purpose of the spring balance in the set-up?

1 Answer

0 votes
by (89.9k points)
selected by
 
Best answer

(a) Transpiration

(b) Oil is put on the surface of water to prevent loss of water by evaporation.

(c) Yes, the transpiration rate will increase. Transpiration would occur faster. The observable changes will occur in less time.

(d) The spring balance progressively measures the change in weight of the set-up. This because as the plant transpires, it creates the suction force in plant which allows roots to absorb more water from the test tube. Hence, the water in the test will get reduced. Thus, the weight of the entire set will decrease.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...