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Nookie1986 [14]
3 years ago
9

Which of the following is a source of genetic variation in sexually-reproducing organisms? A-meiosis B-Mitosis C- Translation D-

All of these
Biology
2 answers:
Anit [1.1K]3 years ago
7 0
A, because every sex cell is genetically different from on another 
Yuliya22 [10]3 years ago
7 0

Answer : The correct answer is -

A-meiosis.

Meiosis is a type of cell division (a reductional cell division) that occurs during the process of formation of gametes particularly in sexually reproducing organisms.

During prophase of meiosis I, crossing over between homologous chromosomes takes place, resulting in the genetic diversity in new chromosome that come in the gametes.

Apart from this, when gametes from two parents fuse, new genetic combination is produced in the resulting zygote.

Thus, meiosis is a source of genetic variation in case of sexually reproducing organisms.

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Symbiotic Relationships : A long term relationship between two biotic factors, where at least one benefits





Mutualism= symbiotic relationship where both organisms benefit (+,+) o Example- rhino & woodpecker (rhino gets rid of parasites and bird gets food) 



Parasitism = symbiotic relationship where one benefits and the other is harmed, but not typically to the point of death (+,-) o Example- tapeworm in an animal, tick or flea on a dog (parasite benefits at the expense of the host) 




Commensalism = symbiotic relationship where one benefits and the other is neither helped nor harmed (+, 0) o Example- barnacles on a scallop (barnacles get a habitat/place to attach while the scallop is not hurt or helped by their presence).



















Symbiotic Relationships:

In symbiosis, two or more species live together in a close, long term association. Symbiotic relationships can be beneficial to both organisms or may benefit one organism and leave the other harmed or unaffected. Parasitism is one type of symbiotic relationship that is detrimental to, or harms, the host organism. In this relationship, one organism feeds on and usually lives in another, typically larger, organism. Mutualism is a symbiotic relationship in which both participating species benefit. A well known instance of mutualism involves ants and aphids. The ants feed on fluid the aphids secrete, and in exchange, the ants protect the aphids from insect predators. A third from of symbiosis is commensalism, a symbiotic relationship in which one species benefits and the other is neither harmed nor helped. Among the best-known examples of commensalism are the feeding and protection relationships between certain small tropical fishes and sea anemones, marine animals that have stinging tentacles.








Hope that helps!!!!!! :)


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