Suppose that the continuous column of water molecules moving upward through the plant is broken near part b, and a small air pocket forms in the xylem. how might this affect the transpirational pull within the plant?

They don't have a science option but: As light travels from air to water to glass, it will refract. The best explanation for this would be A) Glass is less transparent than water, which is less transparent than air.

How many proteins of average size could be encoded in a virus with a dna genome having 12000 bp assuming no overlap of genes?

What conditions of plate movement create divergent plate boundaries

Which is the most likely cause of the observed variation? differences in the climate among the islands competition among individuals for available food sources competition among individuals for desirable mates differences in egg size among the

What role do bacteria play in the nitrogen cycle?

Which of the following is not used to collect data? pseudoscience surveys models observational studies

The denaturation of proteins in a cell would have a profound effect on which of the following cellular activities? Choose all that apply.

Which of the following is not true of pyrimidines? A. example: thymine B. have a single ring structure C. example: cytosine D. example: adenine

Which class of molecules functions as chemical signals?

How many countries does North America have?