<em>The answer is: E. it protects the heart and lungs</em>
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<em>Appendicular skeleton covers our upper and lower limb while the heart and lungs are located in the middle. Axial skeleton on the other hand covers all organs from the head all the way down to our waist. This means that heart and lungs are also protected by axial skeleton.</em>
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<span>c.)The product only has different physical properties than the reactants because a chemical reaction occurred.
This is because rust can behave differently than oxygen and iron. This is because a chemical reaction has happened- a chemical reaction is when a new product is formed. Rust can be change chemically and physically. </span>
<span>7. Extra sugar into the blood to provide enough food source. It can also trigger the hormone adrenaline which gives energy.
8. Bone marrow increases the white blood cell count which overall increases the chance of countering infections
9. The parasympathetic nervous system is responsible for keeping the body at a relaxed state . I.e. it would reduce the heart rate if it is too high. The parasympathetic nervous system is affected by a stresser causing it to become inactive until the stressor has gone
10. increased blood pressure can develop into chronic stress.
11.If you have chronic stress lasting more than a month there is a high probability you will catch an infection.
12. Our sympathetic nervous system controls stress by changing our body state i.e. higher heart rate.
13. Renin is an enzyme that is secreted into the body by the liver which is used to restore liver stress levels.
14. Glucocorticoids is a series of hormones/drugs that are used to treat any inflammatory conditions especially in the brain, liver and kidney
15. The immune system is made up of more than a trillion white blood cells all coded to help deal with different types of pathogens.
16. Its a type of hormone produced by the thymus gland which is heavily used in the immune response to fight off infections.
17.a large cell that is found in the damaged tissue which helps fight off infection
18. It is a type of lymphocyte responsible for the production of antibodies. it can be found all over the body
19. *cannot be answered*</span>
The mentioned case represents secondary succession.
Secondary succession is one of the two kinds of ecological succession of plant life. Secondary succession refers to a procedure initiated by an incident, like harvesting, forest fire, hurricane, and others, which minimizes an already settled ecosystem to a lesser population of species.
Thus, it can be said that the secondary succession takes place in preexisting soil on the other hand primary succession takes place in a place devoid of soil.
Secondary succession is the ecological succession, which takes place after the initial succession has been disrupted and certain plant and animal species do prevail. It is usually faster in comparison to primary succession.
The answer is option C. Number of double covalent bonds between carbon atoms is responsible for causing different shapes of saturated and unsaturated fatty acids. The double covalent bond causes kink in the unsaturated fatty acids because of which their stacking is disrupted and they become loosely packed. The problem with double covalent bond is that unlike single covalent bond it can't rotate and has almost cis-configuration. This is also the reason behind their liquidity at room temperature.
