Which of the following is defined as removing an animal from a herd when it does not meet standards? breeding culling marketing tracking

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13