Exam 29: Plant Diversity I: How Plants Colonized Land

Researchers tested nitrogen loss from soil where the moss Polytrichum was growing,and compared it to soil from which Polytrichum had been removed.The data are presented below. -Loss of soil nitrogen via "gaseous emission" was found to be negligible.Rather,most loss of soil nitrogen was due to water erosion of the soil.Which of these hypotheses is least likely to account for the observed results?

In animal cells and in the meristem cells of land plants,the nuclear envelope disintegrates during mitosis.This disintegration does not occur in the cells of most protists and fungi.According to our current knowledge of plant evolution,which group of organisms should feature mitosis most similar to that of land plants?

Structurally,phragmoplasts should be most similar to

The functional role of sporopollenin is primarily to

Upon closer inspection of the leaves of flower of stone,one can observe tiny,cone-like structures.Each cone-like structure emits spores of two different sizes.Based on this information,which of the following can be properly inferred about flower of stone? 1)It is heterosporous. 2)It is a fern. 3)The cone-like structures are sori. 4)It is a lycophyte. 5)It has separate male and female gametophytes.

Upon closer inspection of the leaves of flower of stone,one can observe tiny,cone-like structures.Each cone-like structure emits spores of two different sizes.Consequently,flower of stone should be expected to possess which other characteristics? 1)a gametophyte generation that is dominant 2)lignified vascular tissues 3)microphylls 4)filamentous rhizoids,but not true roots 5)spores that are diploid when mature

Which of the following was not a challenge for survival of the first land plants?

Which of the following statements is true of archegonia?

The structural integrity of bacteria is to peptidoglycan as the structural integrity of plant spores is to

Considering that the mature sporophytes of true mosses get their nutrition from the gametophytes on which they grow,and considering these generations as individual plants,what is true of the relationship between true moss sporophytes and gametophytes?

The leaflike appendages of moss gametophytes may be one to two cell layers thick.Consequently,which of the following is least likely to be found associated with such appendages?

You find a green organism in a pond near your house and believe it is a plant,not an alga.The mystery organism is most likely a plant and not an alga if it ________.

Use the following figure to answer the questions below. -Which of the following should be most helpful in distinguishing the clades depicted on the tree in the above figure from each other?