Answer: The A horizon is the top layer of the mineral soil horizons, often referred to as 'topsoil'. This layer contains dark decomposed organic matter, which is called "humus". The technical definition of an A horizon may vary between the systems, but it is most commonly described in terms relative to deeper layers.
Explanation:
Soil consists of different layers that are often called horizons. There are three main soil horizons called A, B and C as well as an organic layer (O) on top of the soil (O) and bedrock (R) below: ... It is only between 5 to 10 inches thick and consists of organic matter and minerals.
Answer:
The organisms will evolve to fit the environment better.
Explanation:
one specific example would be tigers having stripes. The tiger went through natural selection for the entire species to have stripes, now that the tiger has stripes it can hide in the tall grass and camouflage itself from its prey so it can hunt better.
Answer:
The answer is B
Explanation:
It uses carbon, light, and water but not chemical because it doesn't produce.
<em>Contradictory claims made by some experts</em><em> is a characteristic of Pseudoscience fact.</em>
<u>EXPLANATION: </u>
Pseudoscience is characterized by contradictory claims that are said to be scientific, but they are not compatible with scientific methods. They are the statements or beliefs that are usually not open for evaluation by other experts.
Also, these are not studied facts which means there is a lack of evidence to support them scientifically. These beliefs are also very resistant to change. For example, Astrology is a Pseudoscience. Other examples are theories related to Bermuda Triangle, Ancient Aliens, etc.
Explanation:
in DNA nitrogen bases are adenine, thymine, guanine and cytosine and in RNA nitrogen bases are same but instead of the thymine there's uracil
in DNA there are linked together adenine and thymine ; Guanine and cytosine. And in RNA adenine and uracil; Guanine and cytosine.