Tag: biology

Water that has been contaminated by human use, industrial processes, or other pollutants is universally referred to as wastewater.

After treatment, or sometimes untreated, wastewater is typically discharged into natural water bodies like rivers, lakes, or oceans.

There are several source of water pollution like industrial effluents, sewage water, radiobiological pollutants etc. Alum is used to clarify water by coagulating soil or mud particles whereas chlorine makes water free from pathogenic bacteria.

Waste articles are sorted out by Rag pickers and then rag pickers sell the articles to the industries engaged in recycling. 

Apogamy is the development of a sporophyte from the gametophyte without the fusion of gametes (syngamy).

The translator is the special structure to aid the unique type of pollination mechanism of Asclepiads. It is present both in the Periplocoideae and in the Cynanchoideae. In these sub-families, it consists of the three parts which are corpuscular, pollinia or pollen and two caudicles. These are the structures of the attachment to stigma. Pollen carrier encloses the pollen grains. Caudicles are connective to attach the pollen mass with corpuscular.

Therefore option C is most suitable.

Option C is correct.

Karyogamy is the final step that is conducting the process of fusing two haploid eukaryotic cells together. It then refers specifically to the fusion of the two nuclei. For its occurrence, the cell membrane and cytoplasm of each cell must fuse by the process termed as plasmogamy. It is a common feature of all diploid organisms undergoing sexual reproduction.

Therefore the correct answer is option B.

In angiosperms, the male gametophyte (pollen grain) is highly reduced and does not contain prothallial cells, unlike the male gametophytes of gymnosperms or pteridophytes.

A crassinucellate ovule is one in which the nucellus is massive and well-developed, typically resulting from the division of the primary parietal cell.

When calyx and corolla arise from upper side of ovary it is called epigyny, Ovary is inferior and flower is epigynous.