DDT was a pesticide used to control mosquito populations. Mosquitoes breed in water. Because of its widespread use, DDT washed into waterways and was absorbed by fish and aquatic plants. Bald eagles ate those fish and died in large numbers, becoming endangered. In 1972, DDT was banned from use, and the bald eagle population recovered.
Which of these statements is an inference?
(1 point)
DDT needs to be banned from use.
DDT caused bald eagle deaths.
Bald eagles were dying at high rates.
11 answers
The statement that is an inference is: DDT caused bald eagle deaths.
While the text presents a causal relationship, the other statements either suggest a conclusion that isn't explicitly stated (the need to ban DDT) or state a fact that can be directly observed (high rates of bald eagle deaths). The statement about the cause of those deaths (that DDT was the cause) goes beyond just the presented information and is an inference drawn from it.
The action that would most reveal the creativity used by scientists developing a method to prevent beach erosion is: learning about the experimental systems scientists set up to test their questions about beach erosion.
This option highlights the innovative approaches and inventions that scientists might have created or tested in their experiments, showcasing their creativity in designing solutions to address the issue of beach erosion.
The evidence found by scientists in 1977 while conducting genetic research that shows scientific knowledge is open to change is: They discovered that one gene provides the code for one protein at a time.
This discovery refined and changed the understanding of how genes function in relation to proteins, indicating that the knowledge about gene-protein relationships can evolve as new evidence is discovered. Science is characterized by the ability to adapt and modify theories based on new findings, which this discovery exemplifies.
The process that helps maintain the pressure in plant cells and is related to Fick's First Law is: osmosis.
Osmosis specifically refers to the diffusion of water across a semi-permeable membrane, which is crucial for maintaining the proper turgor pressure in plant cells. It involves the movement of water from areas of lower solute concentration to areas of higher solute concentration until equilibrium is reached, thus helping to keep the cell wall rigid.
The correct answer is: Yes, the given information offers an explanation of how and why the dark peppered moth increased in the population.
This information illustrates the process of natural selection, where the environment (pollution from the Industrial Revolution) caused a shift in the survival advantage of the different phenotypes (light and dark-colored moths). The dark-colored moths had a higher survival rate due to their ability to avoid predation, leading to an increase in their frequency in the population.
The true statement is: There was a consensus among scientists that miasma caused diseases before the 19th century.
Before the acceptance of the germ theory of disease, the prevailing belief was that diseases were caused by "miasma," or bad air. It wasn't until the late 19th century that the germ theory, which identified microorganisms as the cause of many diseases, gained widespread acceptance among scientists.
