In the following alignment of 12 base pairs, which sites are phylogenetically informative? Sequence 1 ATTGGTATAAAA Sequence 2 ATTAGTATAAAA Sequence 3 ATTGGTATCAAA Sequence 4 ATTAGTATCAAA
What will be an ideal response?
Only the fourth and ninth sites show variation, and are thus potentially informative sites.
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A gardeners favorite bush died several days after she applied twice the recommended amount of fertilizer. What probably happened?
Selecting for transformants involves
A. identifying organisms that have taken up recombinant DNA. B. searching for RNA. C. production of proteins. D. production of DNA.
Which of the following is not true about meristems?
A. Apical meristems give rise to three types of embryonic tissues. B. Meristematic cells are found only in eudicots and not in monocots. C. They can be apical or lateral. D. Meristematic cells divide into two cells, one of which remains a meristem cell and another that becomes a plant body cell. E. They are responsible for primary and secondary growth.
Shoot branching is controlled mainly by the interaction of
A) auxins and gibberellins. B) auxins and cytokinins. C) gibberellins and cytokinins. D) cytokinins and abscisic acid.