HSC Science Class 11 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Botany

Identify the correctly matched pair

Difference between Gram-positive and Gram-negative bacteria

What are elaters?

What is wood botanically?

Explain the internal structure of Cycas rachis.

When you go to a timber mart to collect timber for your construction of a new house, how will you select good timber?

Explain artificial seasoning.

These questions consist of two statements each printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses.

Assertion: In woody stems the amount of heart wood continue to increase year after Year

Reason: The activity of cambial ring continues uninterrupted

Differentiate the wood formed in Pinus from that of Morus.

Central part of the wood is always dark. Why?

A cross section of tree trunk contains 60 lighter and 60 darker rings. Determine the age of the tree and justify

Differentiate homoiomerous and heteromerous lichens.

Give a general account on lichens.

Which of following represents gametophytic generation in pteridophytes?

What is plectostele? give example.

Roots are 

How root climbers differ from stem climbers?

Gynoecium with united carples is termed as ______.

Explain the different types of placentation with example.

The most basic amino acid is ______.