Agave americana is a monocarpic plant (it has a single carpel). Once it flowers (reproduces), it dies
Although these plants can be very long-lived before flowering (10–30 years, on
average), there is no continued growth after floral meristem replaces apical meristem tissues.
The floral stalk can reach heights of more than 5 meters, and takes all the carbohydrate
reserves of the plant. Based on your knowledge of plant growth and development, which of
the following statements is a plausible explanation for death after flowering in A. americana?
A. Once the floral meristem develops, auxin
is no longer produced and only lateral
meristems can grow.
B. There are no lateral meristems in A.
americana, so growth does not occur after
flowering and the plant dies.
C. There are no apical or lateral meristems in
A. americana; the stalk only grows because
of division and elongation of floral meristem.
D. After flowering, an individual A. americana
knows it has reproduced, so dies because it
has ensured its inclusive fitness by
contributing to the next generation.
A
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Which of the following statements is most likely true regarding the results in the figure above?
A) D is the child of A and C. B) D is the child of A and B. C) D is the child of B and C. D) A is the child of C and D. E) B is the child of A and C.
In terms of membrane lipids, the plasma membranes of archaeons are more similar to those of the eukaryotes than to membranes of bacteria.
Answer the following statement true (T) or false (F)
What is a segment of DNA that can use transposase to move from one place in the genome to another called?
A) regulatory region B) duplication C) translocation D) DNA transposition E) retrospection
A SNP results in a loss of the XhoI site indicated in the bacterial plasmid below. You design a molecular probe that spans the lost XhoI site
Which lane represents the expected Southern blot of a bacterial cell that carries two copies of the plasmid: a normal version and the version with the lost XhoI site?