Which of the following traits may be acted on by natural selection? enzyme activity body shape rate of ontogenetic development instinctual behavior all of the above may be acted upon as long as they are controlled by genes

1. Which of the following traits may be acted on by natural selection? enzyme activity body shape rate of ontogenetic development instinctual behavior all of the above may be acted upon as long as they are controlled by genes 2. Which of the following is not capable of evolving? a population of asexually reproducing fruit flies a rose bush a population of fruit flies the collective feral cats of a city all the HIV in a single patient 3. Below are examples of changes that occur in life. Which one is an example of biological evolution? A cell starts to express a different set of genes when it is exposed to high levels of testosterone. Your taste in music changes dramatically between middle school and high school. A young man’s muscles increase in strength and bulk after he starts lifting weights In New York City, the average wing length of pigeons decreases over a period of 150 years. 4. Population genetics is the study of ________. how allele frequencies in a population change over timepopulations of cells in an individualthe rate of population growthhow genes affect embryological development 5. Which of the following variations could be subject to natural selection? A dog with short legs due to malnutrition is able to crawl into holes better than his litter mates A tree is not infested by a ground-dwelling beetle when the homeowner cuts the lower branches A hyena is born with a spotted fur pattern that allows it to hide in the grass bettwe than his litter mates A pigeon learns than when its keeper comes near it will be fed All of these variations may be acted on by natural selection 7. _____________ is the primary pressure on species to change over time. natural section mutation adaptation

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