Manipulative experiments alter levels of a predictor variable (or factor), and then measures how one or more variables respond to these alterations. ... Natural experiments-An observational study in which we take advantage of natural variation that is present in the variable of interest.
Answer:
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Answer: The correct options that apply to the food web are-
- Food webs are a group of connected food chains.
- Arrows in a food web go from the organism that is being eaten to the organism that is eating it.
- Arrows in a food web represent the flow of energy in a food web.
- Food webs show all of the eating patterns in an ecosystem.
A food web is an interconnected network of different food chains representing flow of energy and matter within an ecosystem. The different arrows in a food chain represent organisms being eaten by other organisms, thereby representing flow of energy. It also represents that an animal can consume more than one food type.
<span>The answer is: Strata</span>
Answer:
No. If the parents are AB and O, the offspring can only be A or B.