The instructions on a chromosome are called-DNA
-Steel jelly
The number of organsims at each levels, so there are more producer than herbivores, more herbivores than carnivores and so on...
A hypothesis is considered scientific if it has something that can be supported or refuted through carefully crafted experimentation or observation
Yes we never know what could happen in an eco system
Answer:
If the child has blood type OO and his mothes has AO type, the father must have O in his genotype: A(AO), B(BO), O(OO). The male phenotype AB exclueds him as father.