The enamel. For example lemon juice can destroy your enamel it’s like another way that protects the teeth but you should also protect the enamel.
Answer:
The correct answer will be option-B.
Explanation:
The plant tissues are composed of three types of cells: parenchyma, collenchyma and sclerenchyma.
The parenchyma and collenchyma remain alive at their maturity but sclerenchyma loses their protoplasm and become dead. These cells deposit lignin in their secondary walls and form hard tissues of the plant-like hard shell of a coconut. Sclerenchyma provides mechanical strength to the plant.
Thus, Option-B is the correct answer.
Answer:
https://phys.org/news/2009-05-bird-songs-environment.html
Explanation:
A)
learn about the universe and the laws of nature.
B)
design new scientific instruments.
C)
make new inventions and processes to benefit humans.
D)
make new scientific discoveries.
I believe the correct answer is C, but I'm 100% on this. Hope this helped though!