Answer:
Fracking can contaminate water supplies if it is not done properly, because the fracking fluid injected into rock to enable gas to be released often contains chemicals. If the borehole is not properly cased to stop leaks, the fracking water can escape into the aquifer
Covalent bonds are formed when two atoms are able to <em>share</em> electrons.
Iroinic bonds are form when two atoms are <em> </em> electrons from each other to complete the bond. This results in a pair of ions.
<u>Covalent bonds:</u>
- Have a definite shape.
- Have a low melting point.
- At room temperature they are in a liquid or gas.
- They occur between two non-metals.
<u>Ionic bonds:</u>
- Have no definite shape.
- Have a high melting point.
- At room temperature they are solid.
- They occur between a metal and a nonmetal.
Answer:
B. Endospores are more resistant to dry conditions and are more efficient at producing ATP than vegetative cells.
D. Endospores are more resistant to dry conditions and are more resistant to environmental toxins than vegetative cells.
Answer;
A. Movement in his lower extremities
Explanation;
-The 1st lumbar vertebra or the L1 vertebra is the smallest and most superior of the lumbar vertebrae. As the first vertebra in the lumbar region, the L1 vertebra bears the weight of the upper body and acts as a transition between the thoracic and lumbar vertebrae.
-The lumbar vertebrae contain spinal cord tissue and nerves which control communication between the brain and the legs.
Because he/she needs to store large quantities of energy that he/she would require for the race. Pasta mainly consists of wheat which a carbohydrate. carbohydrates are primary source of energy in the body. once an athlete consumes pasta, starch in the wheat will digested to produce excess glucose which will be stored in form of glycogen in the live by the help of hormone insulin. during the race day, when an athlete uses all glucose in the blood, glycogen is converted to glucose through the help of hormone glucagon. glucose is transported to skeletal muscle cells where it is converted to energy.
