Answer:
To allow for the passage of light in a microscope.
Answer:
I would say Option B
Explanation:
A controlled experiment is where you have two or more independent variables, that way you have an experiment to compare results with.
Answer:
The chyme, which is already a fecal bolus formed produces an involuntary stimulus reaching the colon that cause the defecation; The first step is the relaxation of the internal sphincter through the sacral nerve (involuntary), and then voluntarily the cerebral cortex through the pudendal nerves that relax the external sphincter.
Answer:
1 Vaccine-preventable diseases have not gone away
The viruses and bacteria that cause illness and death still exist and can be passed on to those who are not protected by vaccines. While many diseases are not common in the US, global travel makes it easy for diseases to spread.
2 The Centers for Disease Control and Prevention (CDC) recommends vaccinations throughout your life to protect against many infections. When you skip vaccines, you leave yourself vulnerable to illnesses such as shingles, pneumococcal disease, flu, and HPV and hepatitis B, both leading causes of cancer.
3 Vaccines are as important to your overall health as diet and exercise
Like eating healthy foods, exercising, and getting regular check-ups, vaccines play a vital role in keeping you healthy. Vaccines are one of the most convenient and safest preventive care measures available.
Because of age, health conditions, or other factors, some people should not get certain vaccines or should wait before getting them.
