What do the amino acids tyr, asn, and thr have in common?

            The given three amino acids are polar in nature.

Explanation:

           The structure of amino acid is generally composed of four parts:

1. Carboxylic group

2. Amino group

3. Hydrogen atom

5. Alkyl or Aryl group

The central carbon atom also known as alpha carbon which is surrounded by amino group on one side, H atom on top, Amino group on right side and Alkyl or Aryl group on down side.

The R group given amino acids are as,

Tyr  =  -CH₂-Ph-OH

Asn =  -CH₂-COO-NH₂

Thr  =  -CH(OH)-CH₃

Hence, due to presence of Hydroxyl groups and Amine groups on Alkyl or Ary l chain the given three amino acids get polar in nature.

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.