Identify the cloud seen in each photograph. Describe the life cycle events associated with each cloud.

In this abbreviated diagram, identify the four major plant groups and the key terrestrial adaptation associated with each of the three major branch points.

What important role does lignin play in vascular plants?a. It is the major component of the cuticle, which prevents plants from drying out.b. It forms the outer layer of pollen grains.c. It forms the tough, rigid cell walls of water-conducting cells.d. It nourishes the embryo in seed plants.

How is energy transferred among antenna pigment molecules?a. by heatb. by redox reactionsc. by fluorescenced. by resonance

Which of the following characteristics of plants is absent in their closest relatives, the charophyte algae?a. chlorophyll bb. cellulose in cell wallsc. sexual reproductiond. alternation of multicellular generations

The appearance of cuticle and stomata correlated with what event in the evolution of green plants?a. the first upright growth formsb. the first woody tissuesc. growth on landd. the evolution of the first water-conducting tissues

Why is chlorophyll green?a. It absorbs all wavelengths in the visible spectrum.b. It absorbs wavelengths only in the red portions of the spectrum (680–700 nm).c. It absorbs wavelengths only in the blue part of the visible spectrum (450–480 nm).d. It absorbs wavelengths in only the blue and red parts of the visible spectrum.

In angiosperms, which of the following is correctly paired with its chromosome count?(A)microspore—n(B)zygote—n(C)egg—2n(D)megaspore—2n

In plants, which of the following are produced by meiosis?a. haploid gametesb. diploid gametesc. haploid sporesd. diploid spores