Answer:
A wave is a disturbance that carries energy from one place to another.
Explanation:
Wave is a periodical deformation that can spread in time and space. The wave can transmit the energy over distance, like for example ocean waves, that can go many kilometers not moving the water. The deformation of the wave is a movement of water that goes up and down.
Answer:
The correct answer is - Option B.
Explanation:
Before the Industrial Revolution, the light color moths were predominant so that they can blend in with the light-colored trees and lichens in their environment. After releasing coal smoke from factories, the trees became darkened, and the light-colored moths become an easy target for predator birds to spot.
Over time, the frequency of the dark moth increased due to they had a higher survival rate in habitats affected by the air pollution and it blends with darker coloration blended with the sooty trees. This is a shift in the population’s genetic variance toward the new, phenotype.
In graph B, light color moth frequency decreases, and after natural selection increases over time and after a decrease in evolution the dark color again decreases.
Answer:
C. Center for diseases control
Explanation:
The center for diseases control is the division of the Department of Health that functions to protect and improve the human health. The main function of center for diseases control is to take preventive measures to check the outbreaks of infectious disease, to improve the health of all individuals and to identify and regulate potential factors that may adversely affect the human health.
Answer:
Their experimental design lacks control group
Explanation:
Based on what I read, the scientists don't have a control group as one of the main groups thus they cannot, in scientific sense, say that the medicine is better or worse. You always need a control group receiving no intervention because then we can compare groups and assess the effectiveness of that intervention (in our case if we had control group vs people who received the medicine, we could see if the people who received the medicine had improved condition etc when compared to participants who did not receive anything)
Answer:
Yes, tests like urine and blood tests.
Explanation:
Make me brainiest.