Using the gas pedal analogy, the proto-oncogene would be an accelerator since they promote cell division and
deregulate apoptosis, while tumor suppressor would
be the brakes since they constrain the progress of the cell
cycle and induce cell apoptosis. An
oncogene is, therefore, when the accelerator
is stuck in down position and the brakes are not working.
Plants inherit genes that enable them to produce chlorophyll, but this pigment is not produced unless the plants are exposed to light. this is an example of how the environment can influence on gene expression.
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Light has an important role in gene expression in plants by producing a number of light-induced changes. One of the examples of the light effects is that chlorophyll and the proteins required for assembling the photosynthetic apparatus are synthesized together with the enzymes needed for carbon fixation. Gene expression influenced by light includes the regulation at the level of transcription or, alternatively regulation of translation.</span>
Heavy rain fall in a region means that the river will expand in size to accommodate the xtra h20. it reshapes the shore line. moving h20 over time can change the land features.
Answer: the answer is b
Explanation: i took the quiz
Answer:
Explanation:
Oil sand is an unconventional source of oil. It requires specialized technology and great expertise to win oil from associated waste materials.
The reason why some companies bother about such oil source is explained below;
- Prevailing cost of oil in the world market makes it profitable to extract these oil from sands. A high cost of oil crude oil is a good cause to produce oil form oil sands.
- Development of new technology can catalyze interest in profitable exploration from unconventional sources.
- Economic policies can also favor the production of this source of oil.
- Demand for oil in the market can jack up production levels that can also be met by oil from oil sand.