Question

1. reproduction is not essential for the survival of an individual ________ but is essential for the survival of the ________

Explanation:

Reproduction is a biological process. For an individual organism, survival doesn't depend on reproduction (as an individual can live without reproducing), but for the species (group of similar organisms), reproduction is essential to continue the lineage and prevent extinction. So the first blank refers to "organism" and the second to "species".

Answer:

The first blank: organism; The second blank: species