<span>Gene experssion are influenced by enviroment. the best example is skin color in case of human for e.g if person with fair color or white complexion goes to africa or any part where sun exposure is more his or her color gets dark .the darking of skin is due to melanin production. see here person is same only difference is in enviromental condition due to which gene which are responsible for the production of melanin are produced.
I hope u understood it</span>
<h2>Axons </h2>
Explanation:
Axons cross from one side of the spinal cord to the other through the gray commisure
- Each arm or extension of the gray matter in the spinal cord is referred to as a horn
- Projecting towards the back of the spinal cord are the dorsal horns (or posterior horns)
- Projecting towards the front are the ventral horns (or anterior horns)
- In the thoracic and upper lumbar regions of the cord, an additional pair of side projections occur, which are called the lateral horns
- A narrow band of gray matter known as the gray commissure stretches across of the center of the spinal cord and connects the two sets of horns
- In the middle of the gray commissure is the central canal, which contains cerebral spinal fluid
Answer:
Option a is the one, that is true.
Sister chromatids separate in anaphase of mitosis and anaphase Il of meiosis
Explanation:
After the interphase in the cell division cycle, the mitosis process begins, which is composed of 4 phases, prophase, metaphase, anaphase and telophase. The prophase occurs when the chromatin is condensed and the mitotic spindle is formed, the metaphase the chromosomes align along the cell equator, in the anaphase the separation of the sister chromatids occurs and in the telophase finally the heterochromatin is converted into euchromatin and the envelope is formed nuclear cell.
Meiosis, which is the cell division of germ cells, also has the same phases but they occur on two occasions: prophase I, metaphase I, anaphase I and telophase I for meiosis I and for meiosis II, prophase II, metaphase II, anaphase II and telophase II. In the anaphase I the homologous chromosomes are separated, they are condensed in the prophase II while in anaphase II the chromatids are separated.
That red blood is when you have like a type of blood like a blood and B blood and who's leham white blood cells come from animals
Newton's second law can be demonstrated by something very massive (high mass) that’s changing speed very slowly (low acceleration) and something very small (low mass) that’s changing speed very quickly (high acceleration. Thus, both the options A and B are correct.
<h3>What is Newton's second law?</h3>
According to newton second law of motion force is always equal to rate change of momentum.
So, Force basically depend on two factor i.e mass and velocity
In first case if mass is constant and velocity is variable then
Force = mass × acceleration.
And if mass is variable and velocity is constant then it's called thrust force
Thrust force = Rate change of mass × velocity.
S.I unit of mass is Newton.
Therefore, Newton's second law can be demonstrated by something very massive (high mass) that’s changing speed very slowly (low acceleration) and something very small (low mass) that’s changing speed very quickly (high acceleration. Thus, both the options A and B are correct.
Learn more about Newton's second law here:
brainly.com/question/13447525
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