"Untreated water from a factory flowing into a lake" is an example of point source pollution.
Why? You can actually point to a specific source- the factory. Runoff isn't considered point source.
If I helped you mark brainliest.
Answer: The answer is B good sir, have a nice day :)
The correct option is this: TWO DRAGONFLY SPECIES REGULARLY MATE BUT THEIR GAMETES ARE INCOMPATIBLE.
In biology, there are different types of reproductive barriers, one of these is prezygotic barrier. A prezygotic barrier is a kind of mechanism that prevent reproduction from occurring by blocking fertilization. In this case, the concerned species will be mating together, but their gametes will not be compatible and thus, zygote will not be formed.
A postzygotic barrier on the other hand is said to occur when the reproduction process is blocked after the formation of zygote or after fertilization has taken place. A good example of this is an hybrid mule that is sterile and can not reproduce.
Answer:
Prokaryote/Bacteria.
Explanation:
The features of the cell which is mentioned in this question match with that of prokaryotic organisms like bacteria.
The salient features of a bacteria are mentioned as under:
1) Presence of nucleoid instead of nucleus: Bacteria do not have well defined nucleus like eukaryotes so their chromosomal material is freely scattered in the cytosol.
2) Plasma membrane: They have plasma membrane which surrounds their interior i.e. their cytosol and other organelles.
4) Cell wall: Outside their plasma membrane they have a rigid cell wall made up of peptidoglycan which provides them a specific shape.
3) Ribosomes: They have a lot of ribosomes in their cytosol.
