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.
Answer:
<h2><em><u>d) meiosis </u></em></h2>
Explanation:
The process of meiosis preserves genetic continuity for future offspring by ensuring that two sexually reproducing organisms produce offspring that have the same number of chromosomes as the parents.
It ensures that the offspring will be able to mate with other organisms of the same species.
Answer:
the plasma membrane folds in ward to form a vesicle containing extracellular material
Answer:
The pattern of growth in which the child is able to control the head and neck before the arms and legs is known as Cephalocaudal Growth.
Explanation:
Cephalocaudal Growth.
This type of growth pattern happens with the humans when they are infants, where fastest growth takes place at the upper part of the body which includes, head. Then the growth started with the gradually lower parts like neck, shoulder etc.
