<span>the answer for this is Veins and Arteries</span>
Answer:
Six to eight
You can add meat to your baby's menu any time after starting solids, which is usually around 6 months. In fact, experts recommend that foods like meat and poultry, along with fortified baby cereal and beans, get introduced early on, since they provide key nutrients like iron and zinc.
Explanation:
Answer:
Fraternal - 2 egg cells
Identical - split of zygote
Explanation:
Fraternal twins are likely to be formed by 2 different egg cells being simultaneously sent by the ovaries and both of them being fertilized by the sperm cells. They are non-identical because the DNA of the 2 egg cells and the 2 sperm cells are different.
Identical twins are formed after a single egg cell has been fertilized by a single sperm cell, then split after the first division. This results in 2 genetically identical embryos because they were formed from the same fertilized egg.
Answer: The Generalised Slowing Hypothesis Theory
Explanation:
The Generalised Slowing Hypothesis is built upon wide observations in many studies of age related slowing and suggests that it is the primary contributor to the declines in cognitive functioning seen with aging.
As people age, B lymphocytes and T lymphocytes become less active. These cells secrete antibodies and are thus crucial to the immune system. T cells are made in the thymus which shrinks as aging occurs. Thus reducing the body's ability to fight infections as aging occurs.
Through the normal aging process, DNA is damaged by environmental factors such as pollutants and toxic agents. As a result, there is deletions of genetic material and mutations in DNA replicated in new cells. Reduced functioning in cells and tissues occur when these errors accumulate.
Also as aging occurs, glucose molecules attach themselves to proteins and form cross links. These crosslinks reduce the flexibility of tissues making them become stiff. The circulatory systems becomes less efficient since the tissues of the lungs, heart and arteries lose flexibility.
Answer:
They lives a busy life.
Explanation:
Leaders do their job every day by setting a goal and then apply full struggle in order to complete the goal in a limited time. The leaders has the ability to manage the time effectively and do more work in a limited time. They are the piece of inspiration and motivation for their teammates and other people. They lives a very busy life and work to serve its people.
