Answer:
D. Sterility Locus
Explanation:
Angiosperms have several mechanisms to prevent self-pollination due to the advantage of cross-pollination. One of such mechanisms is self-incompatibility genes present on the sterility locus.
These genes determine the germination of the pollen on the stigma. If both the pollen and stigma carry the same allele of the gene present at the sterility locus, the germination of pollen is prevented.
The sterility locus has multiple alleles and the presence of the same alleles at the same locus in both pollen and stigma prevents the pollen germination.
For example, pollen from S1S2 individuals can not germinate on the stigma with the S1S3 genotype. Here, the pollen does not obtain water as required for germination from the stigma and are unable to germinate.
One is a longer process than the other, also one is more toxic.
Answer:
I don't think much would change more animals would have lot of food and we would have lot of air
The element that is likely to form a ionic bond with potassium is Cl (answer A)
<em><u>Explanation</u></em>
Ionic bond - is a bond formed when a metal and a non metal react.
Metal loses electron ( donate electrons) while non metal gains electrons ( accept electrons) to form ionic bond.
potassium is a metal while Chlorine(Cl) is a non metal. They react to form an ionic bond by potassium donating 1 electron while chlorine accept 1 electron.
