It is A.carpel because D. stamen is actually the male part and <span>Corolla makes up the second whorl of the flower and it is composed of petals.</span>
Barnacles belong to phylum Crustacea.
I think b, because it’s the time that the isotope takes to fall to half of its original value
Answer:
Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species
Explanation:
The competitive exclusion describes relationship between two species that compete for the limiting sources, and cannot coexist. It is enough for one species to have slightly advantage to be dominant over the other. As a consequence, other species (the weaker one) will be extincted (shift to a different ecological niche).