The first and the fourth test tube exhibit a redish/brown color and the second and third test tubes show a dark blue/black color.
This variation exists due to the fact that amylase was added to the first and fourth test tubes. Amylase acts upon starch and breaks it down to simpler molecules. Therefore, when the IKI solution is added to check for the presence of starch, a negative result is shown. Meanwhile, the starch in the second and third test tubes remained and the IKI test showed a positive result for the presence of starch.
Answer:
fish and tetrapods are both vertebrates that have a backbone with a spinal cord. fish lived before tetrapods because their fossils are in rocks over 500 million years old.
Explanation:
fish and tetrapods are both vertebrates that have a backbone with a spinal cord
Answer: B. The crops and livestock are bigger and stronger, so they provide more food per square foot of land.
Explanation: Good luck! :D
Answer:
ohk nice to meet you too I'm also from some place
No, that's not how DNA testing works.
DNA can be extracted from things such as hair, skin, blood, etc. DNA cannot be extracted from your fingerprint because it is not 'you.'
There is a fingerprint database that has cataloged nearly 70 MILLION fingerprints for use by police and intelligence services worldwide.