Answer:
Keratin serves important structural and protective functions, particularly in the epithelium. Some keratins have also been found to regulate key cellular activities, such as cell growth and protein synthesis
I think it is A and D (at least those are the ones that made the most sence to me).
The following statements apply:
1. Salt is not chemically bonded to water.
2. The ratio of salt to water may vary.
3. Salt and water retain their own chemical properties.
The solution formed by dissolving salt in water is an example of a mixture, it is a physical change and no new substance is formed. The salt and the water are not chemically bonded and salt can easily be recovered from the water by mean of evaporation. Any amount of salt can be dissolved in the water and each of the component, that is, salt and water still retain their individual chemical properties.
Because of transcription. Transcription is the first step, where the RNA is synthesized.
The Punnett square is a diagram used to predict the result of a breeding experiment through analysing predictable traits which will be passed on genetically by each organism. This diagram helps to identify the probability of an offspring having specific genotypes and characteristics after the breeding process. This is determined by placing the parent genotypes into the diagram and crossing them.
