Which cells are connected to companion cells via plasmodesmata?
a. guard cells
b. trichomes
c. sieve tube members
d. tracheids
Answer: c. sieve tube members
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A marked seasonality to a disease is often indicative of
A) certain modes of transmission. B) the presence of carriers. C) a zoonotic infection. D) a bacterial disease.
Plants have the ability to measure day length due to the presence of ____ in their tissues
Fill in the blank with the appropriate word.
Red tide and extensive fish kills are caused by population blooms of ____
a. euglenoids b. dinoflagellates c. diatoms d. ciliates e. brown algae
Which of the following responses is NOT controlled
by plant hormones? a. the growth form of the plant (apical dominance) b. the beginning and ending of dormancy c. the bending of an oat coleoptile toward light d. the production of glucose by the chloroplast e. the formation of abscission zones