Answer:The most characteristic feature of plant cells is their rigid cell wall. Human cells only have a cell membrane. The cell wall is primarily made of cellulose, which is composed of glucose monomers. ... Furthermore, the cell wall also prevents dangerous pathogens from entering the cell.
Explanation:
<span>Nuclei of atoms which make up the newborn baby were made in ancient stars.
Ancient stars exploded many years ago and this is the same nuclei where newborn babies are being made.</span>
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Some populations are related to others
Every time a volcano erupts, the magma always cools down and turn into igneous rocks. Metamorphic rocks are created underground due to heat, pressure and time. The production of these rocks will always continue unless an extreme phenomenon causes all volcanoes to go dormant forever and the earth's crust disappears. Lol
The presence of mineral surface for the amino acid to adhere to may have aided the polymerization of amino acids into peptides in the oceans of early prebiotic earth.
Amino acids are the building bocks of protein. The structure of an amino acid comprises of a carboxylic group, an amino group, a hydrogen atom and a variable R-group attached to the same alpha-carbon atom. There are 22 types of amino acids involved in the formation of proteins.
Prebiotic earth refers to the Earth that existed before the origin of life. The environment of earth was completely different from now. The temperature was extremely hot with no oxygen, abundant of water bodies and ionizing radiations from the space.
To know more about prebiotic earth, here
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