No, not every scientific method begin with an observation. on basis of what we want, steps for scientific method changes.
And in scientific method before observation, first we predict (what will happen in the experiment). after prediction we observe. Prediction is known as hypothesis. And observation is what we are viewing.
Answer:
B. abiotic factors.
Explanation:
Abiotic factors describe soil and temperature in an ecosystem.
c natural variation in the bacteria means that some die while other are more resident and survive
Estrogen
Estrogen is the primary “female” hormone. It is involved in many of the physical and emotional changes seen in transition. Estrogen may be given as a pill, by injection, or by a number of skin preparations such as a gel, spray, or a patch. Pills are convenient, cheap and effective, but are less safe if you smoke or are older than 35
