Can the subject of a sentence also be the direct object?

Nothing answers the question so the sentence has no direct object. The direct object must be a noun or pronoun. A direct object will never be in a prepositional phrase. ... Source: Lesson 101, nor does it have a linking verb as a predicate nominative sentences does.

Explanation:

following type of cultural development caused people to want and buy new products on the market :

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.