Dichotomous key.

What does this mean?
Plants with seeds Go to B
Plants without seeds Go to B

or

Arthropods with wings Go to 2
Arthropods without Go to 3
AND WHAT'S THE MEANING OF GO TO 1 or B?

2 answers

Your text must be defining B or the numbers. We do not have that data.
On the arthropods part there is:
A-butterfly,
B-spider,
C-centipede,
D-mosquito.