Which of the following is true about dna mutations?

a. mutations can only occur in the body cells of an organism.
b. mutations can only be caused by environmental factors such as radiation.
c. mutations can spontaneously occur during dna replication.
d. mutations can only occur in the sex cells of an organism.

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.