Generally, the sun observes a solar cycle of eleven years. In this cycle, there are fluctuations in the activity, such as the ejected levels of solar radiation, and in the appearance of the sun, such as changes in the amount and size of sun spots, solar flares and other phenomena that occur on the sun's surface.
These changes also affect phenomena on earth, especially the auroras.
Major changes to the formation happen due to heat or pressure.
The given question is incomplete, the complete question is attached in the image format with the answer:
Answer:
1. aspartic acid :
asparagine
methionine
lysine
threonine
2.glutamic acid :
glutamine
proline
arginine
ornithine
3. pyruvic acid :
alanine
valine
leucine
isoleucine
4. chorismic acid :
phenylalanine
tyrosine
trypthophan
5. serine :
cysterine
glycine.
Answer:
it allows only some materials to pass through and leave the cell.