Which is considered to be a scientific theory? a) how gravity works b) the fact that gravity exists c) the fact that gravity is necessary d) the idea that gravity is part of physical science

The correct answer will be option-A

Explanation:

A scientific theory is a statement which explains the natural phenomenon and events in-depth.

The scientific theory explains how and why the process is taking place which is based on the accumulation of multiple hypotheses and the experiments performed to test the hypothesis.

In the given question, an option which asks how the gravity works in nature can be explained in the theory and thus option-A is the correct answer.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: