Differentiate between the following specialized roots
A. prop root
B. buttress root
C. pneumatophore
D. storage root
E. photosynthetic root What will be an ideal response?
Concepts to Consider: Prop root--develops from branches or vertical stems and grows
downward into soil, helps support plant in upright position. Buttress root--holds trees upright
and aids in distribution of shallow roots. Pneumatophore--aerial "breathing" root that may
help get oxygen to roots submerged in water. Storage root--stores water or surplus sugars
produced by leaves. Photosynthetic root--aerial root that performs photosynthesis.
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If the actual results most closely resembled those in part (A) in the figure above, then a further question arising from these data is:
"Do the Dawsonia rhizoids have to be alive to reduce soil nitrogen loss, or do dead rhizoids have the same effect?" Arrange the following steps in the correct sequence to test this hypothesis. 1. Add metabolic poison to the soil of the experimental plot of mosses. 2. Apply water equally to the experimental and control plots. 3. Measure initial soil nitrogen contents of control and experimental plots. 4. Determine nitrogen loss from soil of control and experimental plots. 5. Establish two identical plots of Dawsonia mosses; one as a control, the other as the experimental treatment. A) 5 ? 1 ? 3 ? 2 ? 4 B) 5 ? 2 ? 3 ?? 1 ? 4 C) 5 ? 3 ? 1 ?? 2 ? 4 D) 4 ? 5 ? 1 ? 3 ?? 2 E) 5 ? 3 ? 2 ?? 1 ? 4
An atom that is negatively charged because it has accepted an electron is a(n):
A. isotope. B. isomer. C. ion. D. monomer.
Triploblastic organisms give rise to ___ germ layers, which include _______
A. two; ectoderm and endoderm B. two; endoderm and mesoderm C. three; ectoderm, mesoderm, and endoderm D. three; ectoderm, metoderm, and endoderm
In both prokaryotes and eukaryotes the start codon (or initiator codon) is ____, which codes for the
amino acid ____.
a. UGA; proline b. UUU; phenylalanine c. AAA; lysine d. ACG; threonine e. AUG; methionine