When compared to the conducting tubes of xylem what is unique about phloem?
a. The sieve tubes are blocked
b. The sieve tubes are formed from vessel elements.
c. The sieve tubes are living.
d. The sieve tubes are folded over.
e. The sieve tubes contain tracheids.
c
You might also like to view...
Which of the following INCORRECTLY states a principle of the chromosome theory of inheritance?
A. Genes are transmitted from parent to offspring via chromosomes. B. Gametes contain either a maternal or paternal set of chromosomes. C. Somatic cells contain a maternal and paternal set of chromosomes. D. The paternal and maternal chromosomes assort randomly during meiosis. E. Gametes are haploid and somatic cells are diploid.
Which theory of water transport states that hydrogen bonding allows water molecules to maintain a continuous fluid
column as water is pulled from roots to leaves?
a. pressure flow b. evaporation c. cohesion-tension d. abscission e. fusion
In cats an X-linked pair of alleles, B and b, control
color of fur. The alleles are incompletely dominant:B produces black, b produces yellow, and Bb produces tortoiseshell. (a) A yellow cat had a litter of two tortoiseshell and one yellow kittens. What is the sex of the yellow kitten? (b) A tortoiseshell cat brings home a litter of black, yellow, and tortoiseshell kittens. The color of which sex would tell you the color of the tomcat that produced them? (c) A yellow male is crossed with a tortoiseshell female. If the female has all male kittens in her litter of four, what color(s) would they be? What will be an ideal response?
What are fastidious organisms and how do you culture them?
What will be an ideal response?