B. Paleomagnetic data
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A, Law of inertia, an object will keep going unless an outside force stops it. the seat belt keeps a person from launching forward, causing more injury.
Answer:
The claim is valid because the lac operon allows a bacterial cell to shut down a metabolic pathway if it is not immediately needed.
Explanation:
The lac operon is a cluster of genes which contain the same promoter sequence and are transcribed as a single messenger RNA (mRNA). This operon is inducible because the presence of lactose in the cell influences its transcription. Lactose can bind to the repressor of this operon, leading to a conformation change in the repressor, thereby preventing the repressor from binding to the operator and thus allowing transcription of the structural genes. After lactose addition, the β- galactosidase enzyme can break this carbohydrate into glucose and galactose, thereby there is no lactose able to bind with the repressor and therefore this operon shuts down. During transcription, the promoter of the lac operon binds both RNA polymerase and catabolite activator protein (CAP) and cyclic AMP (cAMP) complex.
Answer:The very tip of the root is the root cap, a thimblelike cone of cells that protects the delicate, actively dividing cells of the apical meristem. The root's apical meristem has two roles: It replaces the cells of the root cap that are scraped away by the soil, and it produces the cells for primary growth.
Explanation:
