Answer:
Less biological relevant model and reduce cell to cell interaction.
Explanation:
The two main disadvantages of a 2D model of the digestive system is that it is less biological relevant model and reduce cell to cell interaction. The 2D model does not show high resemblance to reality and this model also fail to show the interactions of two cell surfaces with each other. In short, this model, does not give us complete knowledge about any biological system.
DNA because DNA always has a double helix
Answer: Notice that one of the thirstiest foods is beef. That figure takes into account every use of water before a hamburger or a slice of roast beef comes to your table—including the more than 600 gallons (2,300 liters) needed to grow grass or other feed for the beef cattle. Compare the water needed to raise animals for meat with the water needed for vegetables and fruit. Which uses more water? That would be a chocolate bar. And the least water that is used would be 1 slice of bread
Explanation:
i just coppied and pasted the paragraph below it and than added the 1 slice of bread and it gave me hundred. the answer is 1 slice of bread but you need to add more words to it. This will help trust me ^
Answer:
Number of bacteria required 
Explanation:
Given -
Size of each bacterium 
micrometers long
These bacteria are arranged end to end.
The size of chain to be formed is equal to 
centimetres
Let us say that in forming a chain of centimetres nearly X number of individual bacterium are required.
hence, number of bacterium required to form centimetres chain can be represented as
Number of bacteria required
