Question

Before DNA sequence data became available, phylogenies constructed from anatomical and morphological studies of living and fossil plants often supported gnetophytes as the sister group to the angiosperms. If this hypothesis were true, and the rest of the phylogeny as depicted in your text stayed the same, which of these statements would be true? Select all that apply
a. Angiosperms would be paraphyletic.
b. The phylogeny would support a single origin for vessels.
c. The phylogeny would support independent multiple origins of double fertilization.
d. Seed plants as a whole would be monophyletic.
e. Cycads would be the sister group to all other seed plants.

Answer 1

Answer:

The correct options are B,D and E

Explanation:

The phylogeny support a single origin as all the vessels originate at a common point

Seed plants should be considered as monophyletic because they have common origin and than are separated to angiosperms and gymnosperms.

Cycads also, can't be put with all other seed plants as sister groups because it can only be sister of all gymnosperms.

Answer 2

Answer:

b. The phylogeny would support a single origin for vessels.

d. Seed plants as a whole would be monophyletic.

e. Cycads would be the sister group to all other seed plants.

Explanation: