In an experiment, the group used as a basis of comparison is the 

A. control group.
B. experimental group.
C. empirical group.
D. variable group.


A. control group.

Biology & Microbiology

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The statement, "The total amount of energy in the universe is constant," is a tenet of

A) the first law of thermodynamics. B) the second law of thermodynamics. C) thermodynamic spontaneity. D) entropy. E) enthalpy.

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________ is the scientific study of the relationship between organisms and their environment

Fill in the blank(s) with correct word

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Which of the following structures contains the receptor protein importin?

A) mitochondrion B) nucleolus C) chloroplast D) plastid E) nucleus

Biology & Microbiology

Bacteria of the genus Mycoplasma lack cell walls. What sort of environment do they require for survival?

A) low temperature B) hypotonic C) isotonic D) hypertonic E) a biofilm

Biology & Microbiology