Which of the following terms means the study and comparison of proteins within and among organisms?
A.) genetic engineering
B.) proteomics
C.) genomics
D.) bioinformatics
Answer: B.) proteomics
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The first law of thermodynamics states that energy can be transformed from one state to another, but it cannot be created or destroyed. Taking this into consideration, what can be said about the energy transferred between levels in a trophic pyramid?
A. Some of the energy in a trophic level is converted to heat and is unavailable to the next level. B. All the energy is transferred between trophic levels because components that have no energy, that is, light, are used to create the energy in the chemical bonds of carbohydrates. C. All the energy necessary for a trophic level is transferred. Because there is less biomass at each trophic level, less energy needs to be transferred. D. Some of the energy is held in one trophic level, and only the energy needed to support the smaller biomass at a higher level is transferred. E. Organisms at higher trophic levels only consume the energy they need from lower trophic levels, leaving a "bank" of energy to support the higher level when food is scarce.
After the drought of 1977, researchers on the island of Daphne Major hypothesized that medium ground finches that had large, deep beaks, survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. If this hypothesis is correct, what would you expect to observe if a population of these medium ground finches colonizes a nearby island where Tribulus cistoides is the most abundant food for the next 1000 years? Assume that (1 ) even the survivors of the 1977 drought sometimes had difficulty cracking the tough T. cistoides fruits and would eat other seeds when offered a choice; and (2 ) food availability is the primary limit on finch fitness on this new island.
A) evolution of yet larger, deeper beaks over time B) evolution of smaller, pointier beaks over time C) random fluctuations in beak size and shape D) no change in beak size and shape
What would a comparison of prokaryotic and eukaryotic cells reveal?
a. That they both have a cell wall. b. That they both have a nucleus. c. That they both have an endomembrane system. d. That they both have DNA.
Which of the following families of DNA viruses is the most prevalent in humans?
A. Poxviridae B. Herpesviridae C. Adenoviridae D. Polyomaviridae E. Rhinoviridae