DNA Replication How DNA Makes Copies of Itself. Before a cell divides, its DNA is replicated (duplicated.) Because the two strands of a DNA molecule have complementary base pairs, the nucleotide sequence of each strand automatically supplies the information needed to produce its partner
Answer:
Selenium mineral.
Explanation:
Vitamin E deficiency causing by the selenium mineral, not having enough selenium which is needed in our body system, this deficiency can cause many health problems. It is known as a trace mineral which is important for human health.
It may cause premature infants and develop a serious type of anemia, weak muscles and difficulties in walking, impaired coordination, & reflexes. The diagnosis of this deficiency is depends on physical examination, and symptoms.
Answer:
D
Explanation:
Because,
Mechanical weathering is the breaking down of rocks into smaller pieces without changing the composition of the minerals in the rock. This can be divided into four basic types – abrasion, pressure release, thermal expansion and contraction, and crystal growth.
Answer:
The respiratory system enables oxygen to be taken into the body and it ensures the movement of carbon dioxide outside the body.
When we breathe in, our diaphragm moves downwards. Air enters the lungs through the larynx where it is filtered. from there it travels down the trachea, to the bronchi and then to the bronchioles. Alveoli are the air sacs where the exchange of gases takes place between the lungs and the blood. The alveoli pass oxygen into the blood and the blood passes carbon dioxide to the lungs. As we exhale, the diaphragm rises upwards causing the air to flow from the trachea to the larynx and exhalation from the mouth.
