That students who study make better grades than those who do not.
A. The data did not support the hypothesis because more people preferred tap water.
Answer:
D. Useless
Explanation:
According to Dictionary.com, “in vain” is defined as “without real significance, value, or importance; baseless or worthless.”
Answer:
a) chlamydia
Explanation:
Chlamydia causes trachoma and is associated with sexually transmitted diseases
Scientists first discovered cells through the microscope
