An experimenter wanted to test the effects of cigarette smoking on rats. She infused the cages of 50 rats with cigarette smoke and the cages of another 50 rats with pure, clean air. The rats that received the clean air were the ____



a. experimental group
b. control group
c. model group
d. predictive group
e. independent group


b

Biology & Microbiology

You might also like to view...

Why is olfaction an ancient sense?

a. it was the first sense to develop in humans b. it was used solely to find potential mates c. it was used to detect predators d. it was used to find shelter e. it was the first sense to develop in amphibians

Biology & Microbiology

Initiation of transcription requires:a

a promoter sequence. b. DNA polymerase. c. an RNA primer. d. a DNA primer. e. Okazaki fragments

Biology & Microbiology

Following DNA replication, the attached copies of each chromosome are called ________

Fill in the blank with correct word.

Biology & Microbiology

In which organelle are lipids synthesized and modified within the eukaryotic cell?

A) the Golgi apparatus B) the vesicle C) the rough endoplasmic reticulum D) the smooth endoplasmic reticulum E) the lysosome

Biology & Microbiology