B, F as in 1st blank no other word suits and in the second blank in the first line is mentioned most adaptive so it would be widespread si that pervasive(f)

QA : Basis for ,pervasive (which can mean prevalent , or most believed)

I would say innovative is the coolest trap option, we would highly jump for the option D. However, the sentence never mentions anything about if it was innovative among us.

Blank (i) it should be (b) basis for.
The other options a and c will not give the opposite for the previews claim.

Blank (ii) it should be pervasive which means everywhere. it mentions that virtually all believe something.
controversial ==> there is no agreement
innovative ==> new and does not make sense in this content

The correct words for the blanks are (i) basis for and (ii) pervasive.

Here's a breakdown of why this combination works best:

The sentence sets up a contrast with the word "however." This means the information after "however" will contradict the idea presented before it.
- Before 1960: Accounts of evolution assumed that adaptation was a product of selection at the level of populations. This was the widely held belief.
- After 1960: Recent studies have not found a (i) basis for or a reason to support this view.

So, the first blank needs a phrase that indicates a lack of support for the old idea. "Basis for" fits perfectly. "Departures from" would imply that studies were moving away from the view, but the sentence says they haven't found a reason for the view itself. "Bias from" doesn't make sense in this context.

The second blank modifies "view." The first part of the sentence establishes that the view was held by "virtually all accounts." This means the view was widespread and common. Pervasive means spreading widely throughout an area or a group of people. This word accurately describes how common the view was before 1960. The other options, "controversial" and "innovative," do not fit the description of a widely assumed, long-standing view.