The key innovation that helped seed-bearing plants
survive in high, dry environments is
a. pollen.
b. the cuticle.
c. xylem.
d. phloem.
e. lignin.
Answer: a
Biology & Microbiology
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Consider the phylogeny (Fig. 34.15) below. Which type of data helped the most in constructing this tree?
A. fossils from the group Glomeromycetes B. morphological characters associated with fruiting bodies C. chromosome number of the different species D. molecular sequence data E. presence or absence of a continuous dikaryotic life stage
Biology & Microbiology
The letter "A" in the above figure represents
a. pericycle b. endodermis c. primary xylem d. root cortex e. primary phloem
Biology & Microbiology
Which of these are symbioses?
What will be an ideal response?
Biology & Microbiology
All of the following are endocrine hormones, EXCEPT:
A) histamine. B) insulin. C) adrenaline. D) thyroxine.
Biology & Microbiology