Answer:
Famine.
Explanation:
Famine, a shortage of water or food, will often result in a significant population decrease.
 
        
             
        
        
        
Answer: increased
Explanation: the more you have the better you can tell where something is acting on you, ie touch
 
        
             
        
        
        
Over the past four decades, researchers have identified many types of oncogenes, including growth factor receptors, transcription factors, and intracellular signaling proteins.
<h3>What are oncogenes?</h3>
These are specific genes in an organism that can cause the formation of cancer. These genes are prone to defects that when activate, signal for a cell to become a tumor. The genes listed in the question are some examples of the types of cells that can be oncogenes. 
Therefore, we can confirm that over the past four decades, researchers have identified many types of oncogenes, including growth factor receptors, transcription factors, and intracellular signaling proteins.
To learn more about oncogenes visit: 
brainly.com/question/7310602?referrer=searchResults
 
        
             
        
        
        
Answer:
Eighty percent of pollution to the marine environment comes from the land. One of the biggest sources is called nonpoint source pollution, which occurs as a result of runoff. Nonpoint source pollution includes many small sources, like septic tanks, cars, trucks, and boats, plus larger sources, such as farms, ranches, and forest areas.
Explanation:
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Hypothesis: If plants are placed in white light, then the will grow better than plants in other colours of light.
Independent variable: Colour of light.
Dependent variable: plant growth.
Control group: the plant in the closet.
Experimental group: the plant is the other light colours.
Constants: miracle grow and amount of water.
Measurements: height of plants.