Answer:
Most practitioners wait until at least 6 weeks to perform a first pregnancy ultrasound. However, a gestational sac can be seen as early as 4 1/2 weeks after your last period, and a fetal heartbeat can be detected at 5 to 6 weeks (though it might not always be).
Answer:
Dental models are created whenever the dentist needs to study the size and relationship of the teeth, gums and dental arches. This is the case whenever the dentist is studying a patient's growth and development, or when significant dental treatment is being contemplated.
To conduct a scientific investigation without bias, you would need to select a random sampling of people and set up preliminary guidelines. Questions need to be conducted and answers collected in the same manner for all people interviewed.
Answer:
15.2%
Explanation:
Mass of aluminum chloride hexahydrate
15g
Density of alcohol base 1g/ml
Mass of alcohol base
84ml*1g/ml =84g
Total mass of mixture
15g + 84g =99g
Mass % of mixture
15g/99g * 100 = 15.2%
Strength of Drysol is 15.2%
The study of development of an organism from the stage of an embryo is called embryology. During the course of study, embryos of different genera of vertebrates, e.g. fish, tortoise, chick, amphibians, rabbit and human embryos are compared with one another.
