Answer:
Bacteria are essential in cycling the nutrients back into the soil for plants to use, and cycling nitrogen back into the atmosphere. Nitrogen is found everywhere in the world, including animal waste, the atmosphere, and decaying matter.
Answer:
Because the have similar limbs.
Because they have similar functions.
Explanation:
(because they have similar limbs)
Homology (evolution) describes a structure that has similar function like limbs on dogs and bears (used for walking) and also have a similar arrangement of bones. The fins on a doplhin might be different from the wings on a bat but they reflect a common origin due to their bone composition e.g carpals and radius bones.
(because they have similar functions)
Analogy (evolution) describes a structure with for example, bird and butterfly wings that have no common ancestor but have the same purpose, in this case flying. They developed independtly as adaptions. This supports natural selection which is a driving force for evolution.
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Answer: B. global warming</h3>
As more CO2 (carbon dioxide) is released into the atmosphere, it traps more heat energy from the sun, and slowly warms the average temperature of the earth. This is the simplified version of what global warming is. Carbon dioxide is considered a greenhouse gas.
A theory is a unifying explanation for a broad range of observations. Science has come up with the scientific method to answer questions through observation. When something has been repeatedly experimented and results are yielded from them scientists cannot conclude answers to their problems just yet.
A controlled experiment needs to be tested multiple times until it yields an average solution that would generally be coming from different testers. Basically, a theory is something that has been repeatedly confirmed through some form of experimentation and observation.
