Answer:
The real answer is A
Explanation:
When parent sunflowers were planted in the desert, they failed to survive. Based on this statement, what is the author suggesting? Parent species may be less able to adapt than their hybrid offspring.
Answer:
The need for light and warmth created by fire, also a more convenient way of starting a fire and something that is portable.
Answer:
A. Bubbles formed
Explanation:
When a student added a piece of limestone to a solution of hydrochloric acid, bubbles are formed.
The bubbles are as a result of the CO2 gas that is formed.
Below is the reaction:
CaCO3+2HCl → CO2+H2O + Ca++ + 2Cl-
From the left hand side, we can see that the reaction is with limestone and hydrochloric acid. Their reaction forms carbon dioxide gas (CO2), water (H2O), dissolved calcium (Ca++) and dissolved chlorine (Cl-) on the right hand side.
With due observation, bubbles will be seen evolving from the reaction. These bubbles formed is the carbon dioxide gas which reveals that a reaction is taking place.
Answer: you are correct :D
Explanation:
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