Answer:
Experimental or interventional studies compare the effect of treatments or interventions with control in humans. Placebo or different treatment(s) or intervention(s) may be used as control. Experimental studies have to be transparent and evidence-based. Two examples include clinical studies as well as observational drug studies.
Before/ securing clothing, wash hands, put on safety gloves
after/sweeping floor and wash hands again
washing hands can go either or both. :)
Mature ovum is being produced in oogenesis, while spermatogenesis has four mature sperms that contains enzymes due to that the sperm is able to penetrate an egg
Look up intelligent design. Intelligent design is an acceptance and understanding of both creation and evolution going together.
