It begins in the stomach and the duodenum through the action of three main enzymes: pepsin, secreted by the stomach and trypsin
Answer:
An ionic bond is formed between a metal and a non-metal. Covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.
Explanation:
There are two types of atomic bonds - ionic bonds and covalent bonds. They differ in their structure and properties. Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation. Relatively high energies are required to break them (50 - 200 kcal/mol). Whether two atoms can form a covalent bond depends upon their electronegativity i.e. the power of an atom in a molecule to attract electrons to itself. If two atoms differ considerably in their electronegativity - as sodium and chloride do - then one of the atoms will lose its electron to the other atom. This results in a positively charged ion (cation) and negatively charged ion (anion). The bond between these two ions is called an ionic bond.
Answer:
A
Explanation:
since living things are made up of cells,it is not difficult to study and draw conclusion..... This has reduced much stress on scientists
The major cause of the really unique properties of water lie in the ability of the water to form four strong hydrogen bonds. About the polarity of watrer several things should be mention: <span>Water molecules are very polar, t<span><span>he polarity of water causes the boiling point of water to be abnormally high and w</span>ater's polarity causes liquid water to have a very high heat capacity.
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Are phylogenetic trees also known as <u>cladograms.</u>
<h3>What is cladogram?</h3>
The cladogram is an important graphic tool used in phylogenetic studies, and represents the evolutionary relationships between different groups of organisms, such as
- fish
- mammals
- reptiles
- and birds.
With this information, we can conclude that are phylogenetic trees also known as <u>cladograms.</u>
Learn more about cladogram in brainly.com/question/27405768
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