When conducting a scientific experiment should you test more than one variable at a time?

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.

Select the correct answer.what is the observable characteristic of a person called? o a. genotypephenotypeoc.alleleo d.gene