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.
The limbs of the organisms are similar because they are formed in similar ways during embryonic development and share similar arrangements.
A. There are double bonds present in the fatty acid chains of a polyunsaturated fat but none in a saturated fat.
That is the right answer >_>
Carbon fixation only takes place in autotrophs. For example plants, algae, and some bacteria, or organisms that make their own food.
The word you're looking for is the Bowen's reaction.
Hope it helped!
