A woody plant lives through 5 years of drought, followed by 5 years of good growing conditions. The ring of xylem cells formed during the 5 good years will
A) be thicker than those formed during the drought years.
B) be living, whereas those formed during the drought years will be dead.
C) be thinner than those formed during the drought years.
D) conduct a higher ratio of sugar to water than those formed during the drought years.
Answer: A
You might also like to view...
Alum is an adjuvant
Indicate whether this statement is true or false.
In general, the vessels that return blood to the heart in a closed circulatory system are referred to as
A. arteries. B. veins. C. capillaries. D. sinuses. E. auxiliary hearts.
External structures that are found in Archaea but not Bacteria are ________.
A. flagella B. pili C. peptidoglycan D. hami
In a particular population, over the course of several dozen generations, an adenine was replaced by a guanine at a particular non-coding locus in the DNA base sequence. The evolutionary mechanism responsible for this change was:
a) migration. b) mutation. c) bottlenecks. d) directional selection. e) genetic drift.