Answer:
14 billion years
Explanation:
Because the percentage of parent isotope remaining decreases by 50% at 14 billion years.
To Identify Parenchyma and Sclerenchyma Tissues in Plants. ... As the cells have a thickened cell wall, little protoplasm, and no nucleus, we can confirm that the slide contains sclerenchyma tissues. To Identify Striated Muscle Fibres and Nerve Cells in Animals.
Answer:
big pp BIG PP small pp :(