I believe the answer would be a zygote as that is when the sperm and the egg have combined and are beginning to transfer sex chromosomes.
The answer is molecules can be saturated and it has no rings
and only single bonds, or they may be unsaturated and can contain the rings or
multiple bonds. Unsaturation is the element of rings and multiple bonds. We should remember that saturated
hydrocarbons have two times the number of carbons (N) plus two hydrogen atoms
in them (2N +2).
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Answer:
*Behavioral isolation occurs when members of a population diverge in their behaviors over time. Eventually, they are unable to mate and become separate species
*Temporal isolation, in biology, a type of reproductive isolation mechanism among sexual organisms in which the differences in the timing of critical reproductive events prevent members of closely related species, which could otherwise breed with one another, from mating and producing hybrid offspring.
*Habitat isolation occurs when habitat preferences lower the probability of mating between individuals associated with differing habitats.
Early diagnosis of childhood cancer is often difficult because the signs and symptoms are SIMILAR TO THOSE OF OTHER CHILDHOOD DISEASES.
Doctors generally find it difficult to diagnosis cancer i children because the accompany symptoms for the disease is quite similar to those of other diseases that children experience. Cancer in children usually occur very rapidly and its diagnosis in most cases typically occur at the late stage.
