Under which of the following circumstances would a DNA microarray be useful? Multiple Choice It would enable a researcher to determine the differences in gene expression between cell types. Researchers are trying to determine if an individual has inherited a genetic disease from their parents. It would enable doctors to determine which genes are responsible for producing diseased tissue in an individual. All of these are circumstances in which a DNA microarray would be useful. None of these are circumstances in which a DNA microarray would be useful.

The correct answer is ''All of these are circumstances in which a DNA microarray would be useful.''

Explanation:

A DNA microarray is used to determine the complete genetic expression of a tissue at a given time. DNA microarrays is one of the most important applications for the information obtained from the systematic sequencing of complete genomes. They consist of a membrane, which can be made of nylon, silicone or a simple glass slide. The DNA of many genes, arranged according to a specific pattern, is immobilized on this membrane. These DNA fragments, which are known as probes or oligos, are arranged in microscopic spots. Microarray technologies are used in research at the molecular level, they allow the study of simple changes in the DNA sequence and mutations in complex genes that are associated with a specific disease, helping to diagnose diseases.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.