Which is best illustrated by watson and crick's ball-and-stick model of dna? a. the importance of sticking to established methods of science. b. the role of creativity in scientific discovery. c. the value of individual scientists working independently from one another. d. the importance of carrying out procedures that can be replicated.

Number and variety of living organisms includes genetic, species, and ecological types

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.

Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.