Botany - Chapter 24

The most recently evolved group of plants are the:

flowering plants

What is the most probable order of evolution?

Double fertilization: bisexual flowers: vessel elements: sieve tubes: herbaceousness

Which of the following is more likely to be a derived feature in angiosperms?

deciduous leaves

A synapomorphy that unites the Magnoliophyta is the:

presence of flowers

The earliest definite angiosperm leaf fossils are from the:

lower Cretaceous and are rare

Eudicots are recognized by:

vascular bundles in the stem arranged in one ring

A flower characteristic that is quite derived and that is a product of considerable evolutionary modification is:

an inferior gynoecium

About 50% of our food calories come from which family?

Poaceae

Which of the following plants is a member of the most derived clade of eudicots?

Sunflower

A pigment uniquely characteristic of the Caryophyllaceae is:

betalain

Classifying Nymphaeales as monocots creates a monophyletic group.

False

The carpels of Magnolia flowers are not fused together into a pistil.

True

Monocots lack ordinary secondary growth.

True

The major pigment in flowers of Caryophyllales is anthocyanin.

False

Asterids are the most derived large clade of eudicots.

True

The 257,000 species of angiosperms are classified in one division called the _____________________.

Magnoliophyta

C.E. Bessey developed the hypothesis of the _____________________ flower, which described the Magnolia-type flower as one that was generalized and relictual.

Ranalean

The pollen grains of basal angiosperms and monocots are all _____________________, having only a single germination pore.

Uniaperturate

Collectively, the Commelinales, Arecales, Poales, and Zingiberales are known as the _____________________ monocots.

Commelinoid

All eudicots share the distinctive feature of _____________________ pollen grains or a derivation of that form.

Tricolpate