Classification based on chromosome number is known as:

How are insects preserved in an insect museum?

Which of the following is useful for the $Ex-situ$ conservation of plants?

Which of the following statements are correct?
$I.$ Plants collected during field studies are pressed and dried on herbarium sheets.
$II.$ The label on the right-hand side of the herbarium sheet contains the scientific name,family,and common name of the plant.
$III.$ Botanical gardens contain collections of plant specimens as well as illustrations,slides,maps,and photographs.
$IV.$ Living plants can be observed and identified in botanical gardens.

Where are maps and botanical books collected and stored?

Which of the following is $NOT$ a characteristic or component of a herbarium?