Pros (good):
- Inexpensive
- Can degrade the crudest oils
- Quick and minor waste is water and CO2
Cons (bad)
- Waves can carry bacteria into place they are not needed or wanted
- Germs may harm marie animals by putting excess CO2 in water
- Germs may be harder to exterminate because they are engineered
Meiosis is referred to as reduction division as it divides the chromosome number in half. Crossing over or recombination is the main reason of shuffled genes and increased genetic variation in gametes in meiotic cell division as the homologous pairs are paired up during prophase.
<h3>What is crossing over?</h3>
Crossing over is referred to as the exchange of genes of DNA between paired homologous chromosomes. It actually occurs during the development of egg and sperm cells i.e., during meiosis.
It is an enzyme-mediated step, in which the exchange of genetic material takes place between non-sister chromatids of homologous chromosomes.
It actually occurs at the pachytene stage of prophase I of meiosis cell division.
Thus, it can be concluded that the crossing over is the main reason of shuffled genes and increased genetic variation.
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Differing orientations of chromosomes along the cell equator during metaphase I in meiosis, resulting in gametes with different combinations of parental chromosomes is known as independent assortment.
The law of independent assortment states that "different genes and alleles are inherited independently within the gonads". This shows that during metaphase I in meiosis, each homologous pair of chromosomes orient themselves independently, such that after the chromosomes separate into gametes, each gamete receives only one allele per genotype, producing haploid gametes.
Independent assortment produces new combination of alleles and enables genetic variation after fertilization.
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Answer:
Organism
Explanation:
The organism level of organization is the level of organisation that comes after the organ system level of organisation. The organism level of organisation is the level at which the living system is complete and comprises of the interconnection and synergy of the lower organization levels.
At the organism or life form organizational level, all the characteristics of living things are manifested.
The basic living system, a functional grouping of the lower-level components, including at least one cell.