Download App

Tissues — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceTissues2 Marks
Question
Explain how sieve tubes manage to be living?
✓

Answer

Sieve tube elements do not have nuclei but have cytoplasm. They are dependent on adjacent companion cells which contains dense and very active cytoplasm and a large elongated nucleus.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Que-Ans (Each of 2 Mark )" from Tissues→Tissues — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Do the plant cells contain centriole?
→
A train starting from a railway station and moving with uniform acceleration attains a speed 40km/h−1 in 10 minutes. Find its acceleration.
→
When was pulse polio programme started$?$
→
Why do the driver and the person seated in front seat need a seat belt?
→
What types of functions does the single cell of multicellular organism perform?
→
Classify the following into solution, suspensions and colloids: Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
→
Which molecules are present in chromatin.
→
What is the nature of the distance - 'time graphs for uniform and non-uniform motion of an object?
→
Explain why, there is no rise in temperature of a substance when it undergoes a change of state though heat is supplied continuously.
→
Who discovered ‘vaccine’ for the first time? Name two diseases which can be prevented by using vaccines.
→