Answer the following statements true (T) or false (F)
1. Animal biomass exceeds plant biomass in most ecosystems.
2. The amount of CO2 in the atmosphere is stable over a period of one year.
3. Insect densities tend to decrease in elevated CO2, all other factors being equal.
4. Biomagnification results in an increased concentration of bioaccumulated chemicals as one moves from upper to lower trophic levels.
1. FALSE
2. FALSE
3. TRUE
4. FALSE
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DNA polymerase catalyzes the synthesis of ____
a. DNA b. histones c. proteins d. ribose e. nucleosomes
The letter “D” in the above figure represents
a. trigger zone. b. output zone. c. input zone. d. conducting zone. e. none of these.
What consequences could arise if the field of bioinformatics ceased to exist as a field of study?
A. Many cures for genetic disorders would not be discovered. B. The creation of new transgenic plants, animals, and bacteria that benefit society would not occur. C. Progress in determining the function of DNA sequences, making comparisons between our genome and other model organisms, and understanding how genes and proteins interact with cells would stop. D. All of these are consequences if the field of bioinformatics ceased to exist as a field of study.
The following are differences between amphibians and reptiles EXCEPT
A. amphibian eggs are laid in water, but reptiles do not require water for reproduction. B. amphibians have smooth non-scaly skin, whereas reptiles are covered with scales and their skin is dry. C. reptiles are ectothermic, while amphibians are endothermic. D. all reptiles respire by the use of lungs, while amphibians use small lungs supplemented by cutaneous respiration.