Answer:
changes in the environment and or cross breeding
Explanation:
Answer:yes
Explanation:
Impure substance is a mixture of 2 or more molecules
Answer:
The skeletal system is vital in supporting the immune system because : Bones contain marrow, a porous material which creates both white and red blood cells. This replenishment of cells allows the body to fight and expel harmful bacteria, environmental toxins, foreign material e.t.c.
The white blood cells formed by the marrow are instrumental in isolating and destroying harmful particles (either on the site or in lymph nodes), or transporting them to the kidneys or bowels for excretion.
NOTE : Some people have marrow disorders which prevent their marrow from forming new cells; this is caused most often by cancer. Today, it is possible to transplant marrow from a healthy individual to a sick patient, and so help their bone marrow form new white and red blood cells to fight their sickness.
I hope it helps :)
The father's father donates only the Y chromosome, not the X chromosome. The father's mother gives him his X chromosome.
Therefore, the father's father does not pass on any of the genetics of his X chromosome
Matter can be recycled, but energy cannot. Also, only 10% of the energy is passed through each trophic level.