It was proposed by a scientist named Charles Darwin.
Answer:
A basic and a non-invasive test done in pregnancies during the course of 28 weeks of gestation is termed as a fetal non-stress test. It is termed non-stress as no stress is imparted on the fetus while performing the examination. The main objective of the test is to determine the fetus's heart rate at the time of its movement.
In the test, it can be seen that the heart rate of the fetus gets increased each time it moves, which shows that the baby is healthy as the heart rate goes up when it moves and goes down during its resting stage. The principle behind the test is that for proper well-being of the fetus, sufficient oxygen is needed and heart rate should come in normal ranges.
Answer:
All cells hace a barrier around them that separates them from the environment and from other cell.The barrier is called the plasma membrane,or cell membrane.
Organic sciences like genomics and molecules
There will be sharp increase in the natality rate in sharks which alert the government so they will be not come under endangered species.
<h3>
What is endangered species?</h3>
A species considered to be facing a very high risk of extinction in the wild is called endangered species.
There are some solution has been tested by the scientist so that they can find that what makes increase in natality rate, incase if there is toxic chemical or anything in water. Ban of shark fishier will also help in shark conservation.
Learn more about endangered species here:
brainly.com/question/10415903
#SPJ2
