D, a sonic boom is only produced when a body is traveling faster than sound
The nurse considers that a 70-year-old female client can best limit further progression of osteoporosis by taking supplement which contains vitamin D and calcium. Osteoporosis is a bone condition where one develops a fragile bone that is very susceptible to fracture. Causes for this condition can be genetics, lack of physical activity, insufficient amount vitamin D and calcium in the body, smoking and many other. This condition does not have any symptoms with it until fractures in the bones happen. One way to prevent or decrease the chances of developing it to serious cases is to supply your body the right nutrients and vitamins.
Answer:
Flowers have male parts called stamens that produce a sticky powder called pollen. When pollen from a plant's stamen is transferred to a different plant's stigma, it is called cross-pollination. Cross-pollination produces stronger plants. The plants must be of the same species.
Explanation:
a) when lactose is absent, the repressor is active, RNA Polymerase cannot bind to the promoter and the structural gene are not formed.
b) when lactose is present, the lac repressor is inactive, RNA Polymerase can bind to the promotor and the structural genes are formed.
Explanation:
The lac operon in E.coli has genes required for lactose metabolism.
It is expressed only when lactose is present in the medium and glucose is absent.
According to the glucose and lactose level the operon is switched on or off.
The lac repressor or allolactose and catabolite activator protein is present in lac operon.
Glucose is the primary source of energy but bacteria loves to fuel down lactose. To use lactose as an energy source lac operon works.
a) when lactose is absent, the repressor is active, RNA Polymerase cannot bind to the promoter and the structural gene are not formed.
b) when lactose is present, the lac repressor is inactive, RNA Polymerase can bind to the promotor and the structural genes are formed.
The lac repressor is a protein that inhibits transcription of lac operon in the absence of lactose.
