Scientists and biologists study the world using experimentation. This can be done through observation, or by performing scientific tests in a lab.
Answer:
Number of Organisms at the level of producers (First level) is more and hence the availability of energy also will be more at the level of producers. Amount of energy available decreases as we you move from the level of producers to the top carnivores.
Explanation:
Answer:
It is the repetition of similar organs, tissues, cell types, or body cavities along the anterior-posterier (A-P) axis.
Explanation
Humans, like other vertebrae are segmented. consider the skeleton, musculature and nervous system of your trunk
Introns are cut out. Think of exons as the part of DNA that exit the nucleus (as RNA of course).
the name of it is called proton :)