Describe the physical factors involved in the layering of the oceans
What will be an ideal response?
Ocean layers are formed as a result of differences in temperature, salinity, and hence density between various layers as a result of heating, evaporation, precipitation, or freezing. This results in a stratified ocean in which the upper layers are the least dense and the lower layers increase gradually in density.
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Review the ABC model for flower development in Arabidopsis shown below. Which of the following statements about the ABC model is incorrect?
A. Activity A alone results in the formation of sepals. B. Activity A and B together result in the formation of petals. C. Activity B and C together result in the formation of stamens. D. Activity C alone results in the formation of carpels. E. If activity B is missing, only petal formation will be affected.
All living amphibians are herbivorous as adults
a. True b. False
Eudicots have stems
a. with scattered vascular bundles. b. with a pith and cortex. c. with no vascular cambium. d. that develop only primary tissues. e. that none of these describe.
Which of these organisms is semalparous?
A. agave plants B. oak trees C. bears D. dogs E. humans