the distance from the crest of one wave to the crest of a successful wave is Wavelength. D.
Answer:
Population
Explanation:
Population refers to the total number of all members of a species occupying a particular area or habitat or region at a given time. Populations are not static but change in size. Populations make up communities. Community comprise of populations of different species of plants and animals that coexist in a given area. Communities make up ecosystem. An ecosystem is a natural unit composed of living and non-living components whose interactions result in a stable self-supporting system. Ecosystems are generally categorized as either aquatic or terrestrial.
D. The effects of pollution can be studied without harming an ecosystem.
Explanation:
The most ethical reason for carrying out a simulation study instead of a direct investigation is the effects of pollution can be studied without harming an ecosystem.
Although he has noble cause for studying the effect of oil leak into the Gul of Mexico, introducing a whooping 10 million liters will even cause more damage to the ecosystem from the ensuing study.
Using a simulation will circumvent this risk and environmental pollution that will ensue.
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Answer: The total mass of plants combined is way more then the mass of animals. Animals cannot make their own food so they must eat plants and/or other animals.
