I think is c d b a b but I'm not sure
A fixed action pattern
is a behavior that is carried out to completion once started, regardless of
changes in the original stimulus and the sequence is unchangeable. The
unlearned behavior of fixed action patterns are triggered by a type of external
stimulus that start off a particular organism.
And reproductive isolation
The statements that are true of heterogeneous mixtures are: they settle out and the proportions of solute to solvent may vary. The correct answer is option A. 1 and 2. Heterogeneous mixtures are considered mixtures wherein the components are not uniform and still retain their properties. Characteristics of heterogeneous mixtures are: the ratio of solute and solvent is not equal, the substances can be separated physically and they still retain their properties even if mixed with another substance.
