Answer:
Explanation:
Researchers can use molecular homologies to reveal the number of mutations in a particular sequence that has occurred in each species since they diverged from a common ancestor
Question:
Solution (explanation):
Greenhouse gases are those gases that accumulate in the Earth's atmosphere and absorb infrared energy from the Sun. This creates the so-called greenhouse effect, which contributes to the increase in the global temperature of the planet. Now, the higher the concentration of greenhouse gases, the greater the retention of heat. These extra gases increase the natural greenhouse effect and cause global warming which leads to a global change in the climate.
Answer: we can conclude that the correct answer is:
Greenhouse gases
Answer for no 3:
Ecosystem means a community of living and non living things by interacting with each other in a system.
Primarily, humans rely on groundwater for their freshwater needs. Moreover, they treat waste water and make it fit for consumption and use it as well. Another mean by which the demand for freshwater is met is by desalination of salt water to produce fresh water, usually by reverse osmosis using membranes.