Which statement is true about Gram negative organisms? A. They appear purple in the Gram stain

B. They are oxidase positive

C. They have an outer membrane

D. They have cell walls with thick peptidoglycan layers

B, C and D are true.

A is false because they appear a pale reddish colour not purple.

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation