Answer:
Precipitates of BaSO4 will be formed.
Explanation:
Most of the sulphates are soluble but barium sulphate is not soluble, it forms precipitates in the mixture. This reaction is of much industrial importance for production of barium sulphate and is used in paints too.
A is right I’m pretty sure
Answer
<u>Lungs</u> - "The human body posses to similar structures for inhalations and exhalation of air in the body". As lungs are in a pair and has the capacity of about 5 liters in total".
When the lungs face cold or humid air they operate as follows.
Explanation:
<u> Releasing Histamine</u>
lungs when faces cold air it release the chemical histamine in it so it can contract the soft muscle and contract the air ways.
<u> Humidifying the air</u>
As the human body has an inbuilt system to humidify the air up to 100 percent and 96' F in temperature for better operation.
Answer:
Explanation:
Natural selection is process of differential survival and reproduction of the organisms which have better phenotypic traits over the other members of the same species. These traits help the organism to survive in unfavorable conditions and they are passed from the parents to the offsprings and through successive generations of the species.
For example, the development of long neck of the giraffe helped them to grab leaves from tree tops.
Answer: Herbivores or autotrophs