Answer:
Hydrogen bond: It is a type of bond which exist between hydrogen atom and other atom having high value of electronegativity. Those atoms having high electronegativity values has the capability to attract the shared pair of electron towards itself. Hydrogen atom have very low value of electronegativity, so the shared pair of electron goes farther from it and nearer to high electronegative atom such as oxygen in water molecule. This bond is very weak than covalent bond.
It is not true bond due to weak force of attraction between atoms.
There are 23 pairs of chromosomes in each human cell and the autosomes (chromosome pairs 1-22) determine certain characteristics. However, there is still one more pair of chromosomes and these are called the sex chromosomes and they can either be shaped as XX or XY. The father's chromosome is the chromosome that determines whether it is a boy or girl, and there is an exact 50/50 chance of it being male or female you just need to draw a punnet square.
Hope this helps :)
Answer:
Gene duplication
Explanation:
Gene duplication is an evolutionary process that includes different phenomena such as, among others, unequal crossover, chromosome rearrangement, chromosome duplication, etc. These duplicated genes are redundant in function and therefore they may accumulate mutations such as insertions or deletions at higher rates compared to single-copy DNA sequences, thereby producing homologous genomic fragments with different lengths
The human population has grown more and more quickly over time since the development of agriculture.
Option (a);
<u>EXPLANATION:</u>
- The growth in agriculture allowed an increase in population over time.
- Agriculture developed with more irrigation facilities and farming machines.
- So, more food could be grown and was available round the year for the
- people to consume.
- With urbanization, food could be transported well across the places.
- A smaller number of people died due to starvation. People settled in towns and cities to do farming.
- Thus, with the overall development of agriculture eventually, health and nutrition improved which led to an increase in population.
The DNA copies are moved to opposite ends of the cell.
