Answer:
apex refers to the highest point or vertex of a plant stem or root. The shoot apex is where fresh stems, leaves, and other parts of a plant grow after the old parts fall off or dry up.
Explanation:In experiments conducted plants with the apex grows and its height increase while the height of the plant without the apex does not change.In another experiment plant with the apex grows towards the direction of sunlight which is positive phototropic movement and the plant without the apex does not turn towards light.therefore we can conclude there is an effect of the apex on the growth of a plant.
In negative control, Repressor molecule is expected to be bound to the operator is there is no transcription.
Repressor molecule is a small protein which binds with the operator gene and prevents it from starting the synthesis of proteins called operon. The repressor molecule controls the amount of enzyme synthesis by reducing its rate of formation. The lac repressor is a protein that represses (inhibits) transcription of the lac operon. In negative control, repressor molecule binds with the DNA molecule and blocks transcription process. A negative control is an experimental control that does not give a response to the test. The system of regulation in lactose and tryptophan operons outlined above is essentially a negative control.
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Answer:
Explanation:
Osmosis. Osmosis is the diffusion of water through a semipermeable membrane down its concentration gradient. If a membrane is permeable to water, though not to a solute, water will equalize its own concentration by diffusing to the side of lower water concentration (and thus the side of higher solute concentration).
