Answer:
https://www.prb.org › humanpopulation
Explanation:
i found this site you can probably go on it to get your answer
The correct answer is option B, that is, adrenal glands.
The endocrine glands also are known as ductless glands as they discharge hormones straightforwardly into the bloodstream. The secretions are discharged into the bloodstream for the brisk reaction. Adrenaline is secreted from adrenal glands, and gets discharged directly into the bloodstream and influences the ANS that monitors different activities of the body like heart rate, dilation of the pupil, secretion of saliva and sweat.
Answer : I believe the answer is D.
Answer:
years
Explanation:
Given-
Half life of C years
As we know -
Where
Mass of radioactive carbon after a time period "t"
initial mass of radioactive carbon
radioactive decay constant
time
First we will find the value of "k"
On solving, we get -
Now, when mass of 14C becomes % of the plant material on earth today, then its age would be
years