The scientific name of maize is .........

The scientist who proposed the 'New Systematics' is .......

$A$ species is defined as "the group of actually or potentially inter-breeding natural populations producing fertile offspring and reproductively isolated from such other groups". The above statement is given by

Which of the following scientists classified plants into groups based on their habitat?

$A$ plant may have different names in different regions of the world. How do botanists solve this problem?

$ICBN$ stands for