DENDROLOGY

DENDROLOGY AND SOCIETY

FAMILIES OF ANGIOSPERMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Angiosperms are widely believed to have a cryptic early history because ____
A
phylogenetic trees place them as crown group gymnosperms
B
phylogenetic trees place them as stem group gymnosperms
C
phyogenetic trees place them as sister group to gymnosperms
D
phylogenetic trees place them as ancestral to gymnosperms
Explanation: 

Detailed explanation-1: -Most phylogenetic analyses based on morphological data agree that among the groups of extant seed plants, the gnetophytes are the sister group of the angiosperms.

Detailed explanation-2: -The Angiosperm Phylogeny Group classification is based on relationships evident in the numerous molecular studies that began to appear in the late 1980s, much of it based on analysis of sequences of chloroplast markers (see A.P.G.

Detailed explanation-3: -This consisted of a grade consisting of isolated taxa (referred to as ANITA), followed by the major angiosperm radiation, clades of monocots, magnolids and eudicots. The last being a large clade with smaller subclades and two main groupings, rosids and asterids, each in turn having two major subclades.

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