Gene flow does not promote speciation, whereas season of fertility, natural selection, and genetic drift do.
Ammonoids are good as index fossils because of the following characteristics;
<span>1.
</span>Their abundance and vast distribution across most shallow
marine waters during the periods
<span>2.
</span>They have easily recognizable
features, such as shells and the highly crenulated and complex suture, that are well preserved in rocks
<span>3.
</span>Their rapid
evolution that can assist determine changes and variations in the then environment
Ecology
is made up of the science of biology. Ecology is a science that deals with the
relationships between groups of living things and their environments. To exist
with one another, organisms belonging to a same species either compete for the
resources or divide it amongst themselves, where animals and plants of the same
species co-exist and creates a beauty with nature.
<span> </span>
