Because they are non renewable sources of energy and they took billions of years to form.
For children with most physical disabilities and
other health impairments, a common cause of academic difficulties is erratic or
irregular school attendance.
Class attendance or school attendance is very important
for your academic carrier because if you are not able to attend the class, you
did not learn anything, you did not finish your homework etc. and when the
exams came you did nothing. So, the children with physical disabilities or
other health issues mostly misses the class due to health issues, and this
irregular attendance causes difficulties in academic carrier.
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It's A, a limiting factor is something that constrains the population size
The correct answers are:
b. Human influenza a virus evolves escape variants, resulting in a distinctive cactus-shaped phylogeny.
All types of Human influenza viruses evolve to escape immunity induced by prior infections and vaccinations.
c. Measles experiences strong selection for escape variants, resulting in a phylogeny similar to a nonpathogenic species.
As a result of measles infection, specific antibody and CD4 and CD8 T cell responses are generated and contribute to virus clearance and protection from reinfection.
The answer is C.<span>saguaro cactus and sagebrush both needing water in the desert.
they are competing for water D is parasitism A is </span><span>a commensal relationship</span><span> and B is mutualism </span>
