Answer:
a. histones. is the correct answer.
Explanation:
In a nucleosome, the DNA is wrapped around eight histones proteins to create strong loops termed nucleosome.
A nucleosome is the structural subunit of the chromatin.
Chromatin is a fiber polymer of double-stranded DNA which is composed up of a nucleosome core. The nucleosome core is made of histone proteins
Each nucleosome is composed of DNA enclosed around eight histone proteins which are called histone octamer.
Urbanization is the main cause of extinction of the biodiversity or became endangrous to go off from the world. because the habitat of that inocient organism is remove.
Single cells divided twice and produces four cells. these cells are sex cells.
In the digestive tract, endocrine secretions end up <u>Blood</u> in the while exocrine secretions end up in the <u>intestinal lumen.</u>
Food and liquids pass through the digestive tract's organs as they are swallowed, digested, absorbed, and expelled from the body as faeces. The mouth, pharynx (throat), oesophagus, stomach, small intestine, large intestine, rectum, and anus are among these organs.
The stomach, small intestine, large intestine, and anus are the hollow organs that make up the GI tract.
The digestive tract, also known as the gastrointestinal tract, is a protracted, twisted tube that extends from the mouth to the anus. It is made up of several muscles that control the transport of food and other cells that make hormones and enzymes to help break down food.
Learn more about digestion:
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D. Both A and B is the correct answer
