<span>Some of the time under some condition</span>
Human blood groups are governed by three alleles. These are called I A ; I B ; I O .
I B shows the codominance
I O is recessive to both other alleles
Pathogens are bacteria, viruses, parasites, and fungi that
cannot be seen by the naked eye, be tasted by our sense of taste, nor be
smelled by our noses. These microorganisms’
causes illnesses, especially to their host, the host serves as their food,
shelter and victim. Pathogens are found in wastes, such as hospital wastes or
in the sewages. Pathogens are mostly parasites, which is why they need a host
to survive.
Adenine, guanine, & cytosine | uracil & thymine
The four reasons are
1) There is an over population.
2) There is a genetic variation in certain offspring that is helpful to survival.
3) The species struggle for survival.
4) The ones that lives will reproduce and pass on their genetic variation.
I hope that's help:0
