The alveoli are surrounded by blood vessels carrying blood to and from the heart.
C) blood vessels
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Exposure to cosmic rays, X-rays, ultraviolet rays, and radiation from radioactive substances may promote diversity among organisms. The correct option is C.
All the different types of life that are present on Earth are referred to as biological diversity or biodiversity. Three layers of biodiversity can be identified and quantified: species, genetic, and ecosystem diversity.
As high-frequency (high-energy) ionizing radiation, x-rays, and gamma rays contain sufficient energy to ionize (take the electron from) an atom or molecule.
Exposure to cosmic rays, X-rays, ultraviolet rays, and radiation from radioactive substances cause mutation, and mutation cause change in genes which cause diversity.
Therefore, the correct option is (C) diversity among organisms.
To learn more about diversity, refer to the link:
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The question is incomplete. Your most probably complete question is given below:
Metabolism
Originate from predicting life
diversity among organisms
DNA duplication
b. zinc
c. oxygen
d. carbon e.nitrogen
Answer: The correct answer is Option b.
Explanation:
Abundant elements are defined as the elements which are present in huge amount on earth. The elements which are required by the living organisms in huge amounts are known as essential elements.
There are in total six essential elements which are required by the body in large amounts. They are Carbon (C), Hydrogen (H), Oxygen (O), Nitrogen (N), Phosphorus (P) and Sulfur (S).
From the given options, zinc is the only metal which is not required by the living organisms in huge amounts.
Thus, the correct answer is Option b.
Answer:
The response for this question: How is it that a code consisting of only four letters (A, T, G, C) can contain instructions for all the different parts of an organism and accout for the diversity of organisms on this planet, would be: These letters, known as nucleotide bases, when paired together, can each code for a wide variety of amino acids, the building blocks of proteins. It is proteins that carry out the instructions that are written in the genetic code and each amino acid in a protein can be coded for by more than one of the organized nucleotide pairings.
Therefore, during the process of translation, meaning DNA-RNA-protein, although the nucleotide pairings are pretty basic and limited, each of them, when interpreted by ribosomes and their accompanying tRNA, will call in different types of amino acids and build different types of proteins, depending on the need, the purpose and the location where these proteins will have to act.
This is how from a limited group of DNA nucleotide pairings, it is possible to have so many differences not only within the same organism, but among all living organisms that exist.