hi,

see it is not possible to become a professor just after completing the b.sc or integrated m.sc course. you need to appear in state wise recruitment exam or ugc net exam for lectureship position.

now coming to the difference of syllabus of b.sc and b.sc honors, honors course syllabus is more the subject and application oriented compare to b.sc course. b.sc honors syllabus difficulty level is higher than b.sc course.

you may take subjects as per your 12th course results and your interest of topics.

subjects for b.sc honors in most colleges are taught on mathematics, physics, chemistry, zoology, biotechnology, electronics science / statistics etc.