Water molecules consist of 2 Hydrogen and 1 Oxygen atom. They are bonded by a polar covalent bond, meaning the electrons shared by the covalanet bonds are not evenly distributed. Oxygen is more electronegative than Hydrogen and will pull the electrons from its bonds with Hydrogen closer to itself. Thus results in a partial positive dipole on the Hydrogen of the water molecule and a partial negative dipole on the Oxygen of the water molecule. These partial charges allow water to hydrogen bond with one another through a process called cohesion.
The appropriate answer is D. Alfalfa. Alfalfa is a legume and these plants play a key role in the nitrogen cycle. These plants house nitrogen fixing bacteria on their roots. The bacteria are housed in tiny round structures of leguminous plant roots. Once the nitrogen is fixed in the soil it can now be used by other plants to make food. These plants include beans peas and peanuts. <span />
Answer:
The correct answer is oxygen was produced by photosynthesis.
Explanation:
During the process of photosynthesis carbon dioxide is consumed and oxygen is released in presence of sunlight.
when plant is placed in the yellow solution and kept in sunlight the plant undergo photosynthesis.As a result the yellow solution in the tube in presence of sunlight turns blue because oxygen is released by reduction which is responsible for the blue coloration of the solution.
On the other hand the plant that is placed in dark unable to undergo photosynthesis due to which there is no change in color.
After reading the contents of the table shown in the attached picture, I am pretty sure that the <span>statement which is the best interpretation of the material presented in the chart is being shown in the first option: </span><span>Scientific explanations are built by combining evidence that can be observed with what people already know. I choose this option as I recognized sort of 'cause&effect' information. In the first one you can see some well-known facts and in the other picture you can see accurate information gathered by scientists due to those facts.
Hope that helps!</span>
