Answer:
When you pet a dog, your nerves send a signal to your brain of the soft, silky, warm fur of the dog. Your brain sends a signal back telling your arm to move up and down the dog. Your nerves feel the warmness and softness of his fur and send it to the brain. The brain relates this to other things and secretes hormones through glands which shows the pleasure.
Explanation:
Have a great day!
Pls mark me brainliest!
#EquestrianLion
C or d
because of the passage you can find the answer
The cell membrane of the plant and animal cells help them to maintain homeostasis. It regulates the particles that move in or outside the cell. All cell work in integrity to maintain homeostasis. The organelles also contribute to this process. Vacuole stores food for this, cell membrane acts as a barrier for foreign materials, mitochondria provide the cell with its energy, nucleus controls all the activity, cell wall protects the cell, cytoplasm maintains the integrity of the cell, ribosomes, and endoplasmic reticulum synthesize and transport the proteins required by the cell.
Answer:
The correct answer is
(b)-Chromosomes are made up of protein and nucleic acid.
(c)-Genes are located on chromosomes.
(d)Chromosomes are found in the nucleus.
Explanation:
DNA coils around a protein molecule present inside the nucleus to form a compact structure called chromosomes. These histone proteins have a positive charge and it neutralizes the negative charge of the DNA.
By 1940 it was known by scientists that chromosomes are made up of protein and nucleic acids and chromosome carries the genetic material but at that time it was thought that protein part of the chromosome is the genetic material.
Then Hershey and Chase experiment in 1952 proved that DNA is the genetic material. Mendel first discovered that traits pass from one generation to another as separate factors. Later the word factor converted into gene in 1909 by Wilhelm Johannsen.
So by 1950, it was known that Chromosomes are made up of protein and nucleic acid, Genes are located on chromosomes, and Chromosomes are found in the nucleus.