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.
You should seriously consider including the answer choices.
Answer:
Visible light
Explanation:
Photosynthesis is a unique phenomenon in which plants use sunlight energy, which is a type of electromagnetic radiation, to manufacture their food. During this process, certain pigments in the leaves of plants called CHLOROPHYLL absorbs the blue and red wavelengths of light ranging from 400nm - 700nm.
However, these wavelengths of light (blue and red) that are used during the photosynthetic process are found in the VISIBLE LIGHT PORTION of the electromagnetic spectrum. The visible light is the only part that can be made use of by photosynthetic pigments.
The Nucleus and ribosome work together in the process of protein synthesis.
Answer:
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living things. All known cellular life and some viruses contain DNA. The main role of DNA in the cell is the long-term storage of information.
Explanation:
