Cell differentiation is your answer
Answer: acetyl group, methyl group, or phosphate group
Explanation Basically different modification can occur to the tail regions of histone .This includes addition of the groups listed above
The processes that lead to most genetic variation in sexually reproducing organisms are as follows;
- cross over
- independent orientation of chromosomes in meiosis
- random fertilization
The behavior of chromosomes during fertilization and meiosis is what brings most of the variation that arises each generation during sexual reproduction.
Answer:
The cytoplasm of the egg cell is same as like that of the ordinary cell's cytoplasm.
It has yolk in its center which contains nucleus, nucleolus and germinal spot.
The mammalian ova contains a small amount of nutritive yolk which provides the nourishment to the embryo for a time being.
The cytoplasm of the unfertilized egg contains some unevenly distributed proteins, specifically the cytoplasmic determinants.
These determinants are the substances that plays a major role in the oocyte formation and maturation. Sometimes they are clumped together and then divided heterogenitically.
Most likely an altimeter,
microscopes can be too heavy to carry outside,
x-ray diffraction is used to determine the molecular structure of a crystal so that is not likely to be helpful,
but an altimeter determines the altitude of an object on a fixed level, so that can be useful during a field investigation
hydrometers-measure gravity of liquids, probably not useful for a field investigation
