If you were asked to build a model of a nucleotide, what structures would you need to represent in the model?
A. phosphate group
B. base
C. ribose sugar
D. codon
E. methyl group
F. five carbon sugar
Answer: F
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Multistranded cords of primary xylem and phloem are
a. vascular bundles. b. found only in monocots. c. found only in dicots. d. formed by stele. e. formed by pith.
Ecological density is a measure of the number of individuals per unit of available living space
Indicate whether the statement is true or false
Which of the following statements regarding diffusion is false?
A) Diffusion is a result of the thermal energy of atoms and molecules. B) Diffusion requires no input of energy into the system. C) Diffusion occurs when particles spread from areas where they are less concentrated to areas where they are more concentrated. D) Diffusion occurs even after equilibrium is reached and no net change is apparent.
High levels of the fungus Batrachochytrium dendrobatidis were found in a local pond. What do you predict will be the consequence of this fungus?
A. Vegetation levels will decline drastically. B. Lichen populations will increase around the pond. C. Since this is a major pollutant in sewage wastewater, an investigation into the source of the fungus must be undertaken. D. Frog populations will decline. E. Humans in the surrounding area will be vulnerable to pneumonia.