In nature, selective pressures on populations are varied and interrelated. Select the primary type of selection best describing the situations below based on the information presented. Pathogenic bacteria found in many hospitals are antibiotic resistant. Brightly colored peacocks mate more frequently than do drab peacocks. Fossil evidence indicates that horses have gradually increased in size over geological time. The cheetah is reputed to be the fastest land mammal. The evolutionary process that gave rise to this speed is most likely what kind of selection? A certain species of land snail exists as either a cream color or a solid brown color. Intermediate individuals are relatively rare.

Pathogenic bacteria found in many hospitals are antibiotic resistant.

Explanation:

Antibiotics are drugs that have the ability to kill pathogenic bacteria, especially in hospital environments, where infection cases are more frequent and can be very serious.

However, in a population of pathogenic bacteria, there may be some that, somehow, are resistant to antibiotics. Thus, while the entire population of bacteria dies with the presence of antibiotics, they survive, reproduce and give rise to another population of bacteria that are not affected by the antibiotic. In this case, there was an evolution generated by natural selection, allowing pathogenic bacteria found in many hospitals to be resistant to antibiotics.

it would lead to upper respiratory infections and pneumonia.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.