Covalent bond (molecular bond): a chemical bond that involves the sharing of electron pairs between atoms.
1. Non-polar covalent bond: the electrons are shared equally between atoms
ex: CH₄ (methane)
2. Polar covalent bond: the electrons are not shared equality between atoms
ex: H₂O (water)
Ionic bond: a chemical bond formed between two ions with opposite charges
ex: NaCl (sodium chloride)
To know the difference between ionic and covalent bonding, one must first understand the chemical difference between sharing electrons and being attracted by charges to one another.
Every atom wants to fulfill the octet rule, or, getting to a stable 8 electrons in its outermost shell. (Having 8 valence electrons)
Atoms in covalent bonds do this by sharing electrons. A good analogy to express this would be if there was a toy that we both wanted, but there was only one of them. Instead of you or I having it to ourselves, we would share. This is what atoms in covalent bonds do.
Atoms in ionic bonds do this by transferring electrons. Sodium loses an electron and chlorine gains an electron (becoming chloride). This is like you taking the toy to yourself. Now because sodium is now a positive ion and chloride is a negative ion, the two come together because opposite charges attract.
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Answer:
Polygenic inheritance.
Explanation:
Polygenic inheritance is also known as multi gene inheritance that are included in the group of non epistatic gene. The genes of the polygenic tratit are additive in nature.
More than two different genes are involved in the polygenic inheritance. This inheritance controls the trait of the organism by multiple genes. Polygenic inheritance shows the different pattern as compared with Mendelian inheritance and environment also plays an important role in the polygenic inheritance. Human skin color is controlled by seven genes and hence referred as polygenic inheritance.
Thus, the answer is polygenic inheritance.
In the small intestine, muscular contractions squeeze chyme forward, and digestive secretions from the pancreas, gallbladder, and intestinal lining chemically break down the nutrients.
<h3>What is the role of the small intestine in food digestion?</h3>
The small intestine plays is a major organ in the process of digestion.
The small intestine is the part in which absorption of nutrients takes place.
The small intestine is the longest part of the digestive system.
Contraction of smooth muscles presents along the walls of the small intestine help to move food forward while the villi absorb the nutrients.
In conclusion, the small intestine is essential to digestion.
Learn more about the small intestine at: brainly.com/question/1204177
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The answer for this question is a. DNA
Answer:
causes the body to secrete enormous amounts of water, leading to diarrhea and a rapid loss of fluids and salts (electrolytes).
