2018: BIO 1 Take Test: Bio 1 8:BIO Untitled - Google De 5 6 50)Blood entering th

Question

2018: BIO 1 Take Test: Bio 1 8:BIO Untitled - Google De 5 6 50)Blood entering the left atrium came directly from.. the systemio circulation. the left ventricle the aorta. the lungs. the right ventricle 49) Assume there are only two breeding pairs of a certain species of monkey left on Earth All four of the monkeys have brown fur (a dominant trait) and are heterozygous for the trait. Each of the breeding pairs have two offspring each, all of which have black fur. Which of the following statements is correct? Microevolution has ocourred because of sexual selection. Microevolution has occurred because of natural selection. Microevolution has oocurred because of genetic dnift Microevolution has occurred because of gene flow Microvolution has not occurred. 48) A male bird has more colorful blue feathers than his compettors and is therefore allowed to mate with the female. His genes for more ?lorful blue feathers are passed onto the next generation while his competitors genes are not. This an example of Mutation Gene flow Natural selection Sexual selection Genetic dr MacBook Air

Explanation / Answer

50) Blood entering the left atrium came directly from lungs. Purified blood with less pressure comes to left atrium. It is then pumped to the rest of the parts of the body by heart.

49) Microevolution has occurred due to genetic drift. Genetic drift is variation in genotypes in small populations. As in this case in a small population of 4 monkeys the genetic drift was from all brown fur to all black fur.

48) Sexual Selection. In Sexual Selection, one gender of organism attracts the other gender to mate. It competes with other similar competitors by showcasing its distinctive features (here colourful blue feathers.)

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