Bob is curious to know which plant fertilizer, if any, will help his peppy plants to produce more peppers. He despises to test the 3 brands that the local nursery sells. He sets up four boxes and plants in each box. He gives 30g of one type of each of the three fertilizers to the first three boxes, and adds no fertilizer at all to the fourth box. What is the dependent variable in Bobs Experiment?

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing

Which of the following is not a type of epithelial cell