Answer:
the answer is A. specific composition and structure, and contains one or more silicon-oxygen tetrahedrons.
Explanation:
When both daughter cells are the same cell type, this is called symmetric division. That's true whether they continue being stem cells or become something new. When one cell stays a stem cell and the other differentiates, it's called asymmetric division. This happens about 30 percent of the time.
They all keep the plant alive and healthy! rawr XD
Answer:
The correct answer is B high levels of lactose and high levels of cyclic AMP.
Explanation:
Lac operon contain 3 regulatory genes and 3 structural genes.In presence of lactose the repressor molecule that is encoded by Lac I gene cannot bound to the operator region.
Bacause the lactose interact with the repressor and change its conformation so that it cannot repress the expression of the structural genes of lac operon.
On the other hand cyclic AMP is a positive regulator of lac operon .The interaction of cyclic AMP with the promoter region of lac operon stimulates the binding of RNA polymerase in the promoter region to boost the expression of structural genes of lac operon such as Lac Z,Lac Y and Lac A.
