The following behaviors help birds increase their reproductive success in different ways. Which one most directly increases a bird’s chance of mating?Choose 1 answer:Choose 1 answer:(Choice A)   An arctic tern migrates from an area of low resources to an area of high resources.AAn arctic tern migrates from an area of low resources to an area of high resources.(Choice B)   A killdeer bird pretends to be injured to distract and lead predators away from its nest.BA killdeer bird pretends to be injured to distract and lead predators away from its nest.(Choice C)   A male bird-of-paradise dances to attract the attention of a female.CA male bird-of-paradise dances to attract the attention of a female.

Read each of the scenarios below. Then, select the option that best represents a scenario illustrating natural selection.A In a population of birds, those with larger beak sizes are better able to crack open tough seeds, providing them with a food source during periods of scarcity. Consequently, the average beak size in the population decreases.B In a population of flowers, those with a particular color variation attract more pollinators and produce more offspring. As a result, the proportion of flowers with that color variation decreases over generations.C In a population of rabbits, those with longer legs are more successful at outrunning predators and are more likely to survive and reproduce. Over time, the average leg length in the population increases.D In a population of fish, those with brighter colors are more easily spotted by predators, leading to higher mortality rates. As a result, the proportion of fish with bright colors increases over time.

Seasonal breeders, like many species of bird, experience a rush of hormones that induce sexual drive and fertility right around the start of the mating season. Which bodily systems are triggered during the mating season of birds? Select TWO correct answers.Select one or more:a.Lymphaticb.Reproductivec.Musculard.Endocrinee.Nervous

A small number of birds arrive on an island from a neighbouring larger island. This small population begins to adapt to the new food plants available on the island, and their beaks begin to change. About twice a year, one or two more birds from the neighbouring island arrive. These new arrivals ________.Question 9Select one:a.speed up the process of speciationb.tend to promote adaptation to the new food plantsc.tend to slow adaptation to the new food plantsd.represent a colonising event responseClear my choice

A deer's antlers, a ram's horns and the bright plumage of a male paradise bird are all examples of which of the following?Multiple choice question.Secondary sexual characteristicsIntersexual selectionSperm competitionPrimary sexual characteristics

In Arizona, most birds gather in trees and bushes surrounding the few available rivers and streams. This behavior shows that Blank______.Multiple choice question.the birds need to migrate to locations where more water is availablefreshwater ecosystems are important to the survival of some terrestrial speciesthe birds have not adapted to the desert conditions