The enamel. For example lemon juice can destroy your enamel it’s like another way that protects the teeth but you should also protect the enamel.
Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
Answer:
Option-D
Explanation:
The network of neurons which gets activated in the condition of stress that is fear or anger is known as Sympathetic nervous system.
During stress conditions, this system prepares the body physically and mentally either to fight or flight by controlling the production of hormones through activation of specific neuron network in the body. Mainly the adrenaline and norepinephrine which act and produces the response like increased heartbeat, sweating and other.
Thus, D)sympathetic is the correct answer.
For most genes on the human X chromosome, 100% of XY males with mutant allele on the X chromosome will express the mutant phenotype.
50 % of human sperm cells that carry an X chromosome. There is 50 % chances that daughter of any male will not carry the gene and can't pass it on and 50 % chance that sons do not have the gene and it will be healthy. 50% chance that son have inherited the gene and express the trait or disorder.
If a Egg is fertilizes by sperm with X chromosome then zygote will be a female ' XX'. If the Egg is fertilizes by sperm with Y chromosome , then zygote will be male 'XY'.
To learn more about human sperm cells here
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Determine whether the following symbols are universal or contextual. In "The Nightingale and the Rose,"
Oscar Wilde uses a red rose as a symbol for love. In To Kill a Mockingbird, Harper Lee uses a mockingbird as a symbol for innocence.
In A Little Princess, Frances Hodgson Burnett uses hot buns as a symbol for the connection between the main character and a poor street child.
In "The Water of Life," the Brothers Grimm use water as a symbol for life.
