Which of these serves as a reference for comparison during a scientific investigation? outcome variable (dependent variable) test variable (independent variable) control group hypothesis

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

Where does the information about where each transcription factor binds originate?

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.