Species are organisms that can breed and give rise to a viable offspring. However, mules (a crossbreed of a donkey and horse) cannot give rise to viable offspring after breeding. It is difficult to apply the term species when referring to such organisms.
Overproduction of offspring and more changes like adaptation for survival.
It is possible for any species to breed to any other species. whether or not conception happens is a whole other question. so yes a pine marten can breed with a fox, no offspring will be produced. just like a human could breed with a lowland gorilla, no offspring will be produced.
Sexual reproduction is when there is two animals or plants needed to reproduce, thus there is more variation in the offspring as the 'parents' are different.
Trisomy 21, Down's syndrome, is viable.
A primipara has delivered one viable offspring.
The medical term for a history of three viable offspring is "para 3." This means the individual has given birth to three viable babies.
Members of the same species can breed and produce viable offspring that will, when mated with others of the same species, also produce viable offspring.
Viable sperm is sperm that is capable of fertilizing an egg and resulting in, when combined with a viable egg, offspring. Hope this helps!
Tetrpara
A group of organisms that can reproduce and create viable offspring is called a species.
Species are organisms that can breed and give rise to a viable offspring. However, mules (a crossbreed of a donkey and horse) cannot give rise to viable offspring after breeding. It is difficult to apply the term species when referring to such organisms.
A species, only two animals of the same species can mate and have viable offspring (offspring that can also reproduce)
Overproduction of offspring and more changes like adaptation for survival.
Organisms that can interbreed and produce fertile offspring belong to the same species classification. Organisms within a species share similar characteristics and can reproduce to create viable offspring.
Organisms that can interbreed are all members of the same species if their offspring are viable (can themselves breed).
They don't live in a polar climate If they were adaptive to it (that is they had the ability to survive and produce viable offspring in such conditions) they would be living there.