Regarding the different systems of plant classification, which of the following statements are accurate?
a. The earliest systems of classification were based on phylogenetic relationships.
b. Artificial systems, like the one given by Linnaeus, were based on vegetative characters or on the androecium structure.
c. Artificial systems gave equal weightage to vegetative and sexual characteristics, which is considered a drawback.
d. Natural classification systems, like the one by Bentham and Hooker, considered only external features.
e. Phylogenetic classification systems are based on evolutionary relationships between organisms.
f. Numerical taxonomy gives more importance to sexual characters than vegetative characters.
g. Cytotaxonomy is based on cytological information like chromosome number, structure, and behaviour.
