Answer:
a
Explanation:
the kidney secretes an enzyme called rennin that helps to control blood pressure is not true the kidney does not secret rennin
Answer:
C. is the correct answer.
Explanation:
This choice only leaves one question out: "Is it a less expensive alternative?"
This is an unnecessary question, for there are many items that hurt the enviroment that are cheaper to the consumer.
All other questions are correct.
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false
Explanation:
The half-life of C-14 is shorter than that of U-238. Every radioactive isotope have their distinct and unique half-life.
- The half-life of an isotope is the time taken for half of the radioactive nuclei to disintegrate.
- The shorter the half-life, the faster an isotope decays.
- C-14 has an half life of 5700 years. It is used for dating archaeological materials.
- U-238 has an half life of 4.5 billion years. It has been used to date the age of the earth.
Half - life brainly.com/question/1695370
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