Answer:
The behavior of chromosomes during meiosis and fertilization is responsible for most of the variation that arises in each generation. Three mechanisms contribute to genetic variation arising from sexual reproduction: independent assortment of chromosomes, crossing over, and random fertilization.
Organisms are made up of a bunch of cells. Billions of cells coming together make up an organism.
DNA ligase is an enzyme that repairs irregularities or breaks in the backbone of double-stranded DNA molecules. It has important role in the process of DNA replication and DNA repair. It has three general functions: It seals repairs in the DNA, it seals recombination fragments, and it connects Okazaki fragments (small DNA fragments formed during the replication of double-stranded DNA). DNA ligase functions by forming a bond between the end of a “donor” nucleotide and the end of an “acceptor” nucleotide.
Polyploidy is the term that describes the chromosomal abnormality of having extra chromosomes.
All of them are correct soil erosion turns grains of soil into mere grains of sand which when placed in water makes the water much cloudier, biodiversity will decrease as soil erosion leads to a more Barron and dry landscape, respiratory disease may be caused by inhaled particles of dust which can be create from soil erosion, and desertification as mentioned earlier soil erosion leads to a more baron and dried out landscape as the soil can’t hold water as much as it used too.
