D. Erasmus Darwin - competition and sexual selection as an impetus for change
Answer:
Collagen
Explanation:
Vitamic C or ascorbic acid acts as a cofactor in the process of collagen synthesis. It has been shown that lack of vitamin C leads to the impaired collagen synthesis. Beside that activity, vitamin C has many other funtions within organism:
- antioxidant
- cofactor in other enzymes
- involved in wound healing (repair of tissue)
- involved in the production of some neurotransmitters...
Answer:
synarthrosis
Explanation:
Two or more bones can glue together to form what is known as a joint. Joints can be moveable or immovable depending on the connective tissues and the bones involved.
synarthrosis is a type of fibrous joint that permits very minimal or no movement. They are called fibrous joints because they are held together by fibrous connective tissues with threads of collagen. Synarthrosis are usually located at areas protecting delicate internal organs. For example, the sutures consisting of skull bones protecting the brain. Another example is the cartilaginous joint that protects the heart which consists of the manubrium and body of the sternum
Answer:
Taking into account the concepts presented in chemistry with respect to elements and compounds, it is possible to affirm that the compounds are formed by two or more elements.
Explanation:
Two or more chemical elements have the ability to bind -by forming bonds- to obtain a compound. This occurs randomly in nature.
The bonds between the elements that form a compound must be stable enough to ensure the stability of the molecule. A chemical compound can only be separated into the elements that form it by chemical processes.
The bonds types that form compounds can be:
- <em>Ionic bond.</em>
- <em>Covalent bond.</em>
- <em>Coordinated covalent bond.</em>
- <em>Metallic bond.</em>
It is necessary to mention that chemical elements are called atoms, and the bonds between them are molecules. The physical and chemical properties of a compound will be different from the properties of the elements that form it.
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