WGU- Intro to Biology C190 Questions with Correct Answers (100% Verified)

A subatomic particle has a negative charge and is found in a shell of the atom. What is the particle? Correct answer an electron Male peacocks compete with one another to mate female peacocks. Males with more colorful tail feathers attract female mates at a higher rate than those w/o. Therefore male peacocks have colorful tail feathers, whereas female peacocks do not. What is this an example of? Correct answer sexual selection A gardener maintains a species of rose that producd either yello flowers ( the dominant phenotype) or white flowers ( the recessive phenotype). One day, the gardener observes that a cross between two yellow rose bushes has led to a single rose bush with orange flowers. What evolutionary mechanism is involved in the change in the gene pool of this species? Correct answer mutation Some cells need to maintain a set of cencentrations of na+ and k+ ions. These cells are able to do this with the help of the na/k pump, which transports these ions from areas of low concentration to areas of high concetration ( against their concentration gradient). Na+ is pumped out and k+ is pumped in. Which type of membrane transport is involved in this action? Correct answer active transport Chromosomes are structures that contain hereditary mateiral that will be passed from one generation to the next. According to this information, which organic molecule must be present in chromosomes? Correct answer dna A cell has divided its chromosomes into wo new nuclei. The cytoskeleton of the cell is currently pinching the cell in the middel to from two new cells. In which stage of the cell cycle is this cell? Correct answer cytokenesis There are four species of woodpeckers that inhabit the pine forests in the southeastern area of the u.s. Individuals of this species utilize many of the same resources for food and nesting. Which level of ecological organization describes the relationship among these four species of woodepecker? Correct answer community Two species of woodpecker inhabit the same loblolly pine woodland throughout the southeastern u.s. Each species requires recently deceased (but still standing) pine trees for reproduction . The woodpeckers excavate their nest cavities in the dead pine trees. In most healthy forests there are generally not enough dead pine tress to provide nests for all the woodpeckers that want to build them. What is the relationship between these two species of woodpecker an example of? Correct answer competition