fill in the blank questions
monotremes, marsupials, and placentals have the same _____ known as the therapsid.
a farmer sprays insecticide on his crops and notices that the insect pest problems disappear. a year later he tries the same insecticide only to find that he did not achieve the same result. the insect population shows resistance to the insecticide. This is an example of ______ acting on a population to change its characteristics
please help me
anyone at all?
did you figure it out yet?
Natural selection.
Is that rifgh?
Sure! I'd be happy to help you fill in the blanks and explain how to find the answers.
1. Monotremes, marsupials, and placentals have the same _____ known as the therapsid.
To find the missing word in this sentence, we need to figure out what is commonly shared by monotremes, marsupials, and placentals. The word that fits the blank is "ancestor." These three groups of mammals share a common ancestor known as the therapsid.
2. A farmer sprays insecticide on his crops and notices that the insect pest problems disappear. A year later, he tries the same insecticide only to find that he did not achieve the same result. The insect population shows resistance to the insecticide. This is an example of ______ acting on a population to change its characteristics.
To find the missing word in this sentence, we need to understand the situation described. The farmer sprayed insecticide, which initially solved the insect pest problems. However, after a year, the same insecticide didn't work, indicating that the insects developed a resistance to it. The word that fits the blank is "natural selection." This is an example of natural selection acting on a population to change its characteristics, as the insects that were resistant to the insecticide survived and reproduced while those susceptible to the insecticide died off. Over time, the resistant insects make up a larger portion of the population.