Answer:
In a reflex action, the spinal cord along with the brain stem is responsible A few examples of reflex action are: When light acts as a stimulus, the pupil of the eye changes in size.
Answer:
Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. As dramatically demonstrated in AIDS patients, without helper T cells we cannot defend ourselves even against many microbes that are normally harmless.
Explanation:
Answer:
<em>The correct option is B) STR analysis</em>
Explanation:
Short-tandem repeats can be described as a repetitive pattern of 2-16 base pairs which is unique to individuals. In molecular biology or forensic studies, STR analysis is done to determine the Short- tandem repeat regions in an individual. This analysis helps to discriminate one DNA from another.
The forensic scientist can use the STR analysis from the blood on the glass and compare it with the STR analysis of possible suspects.
Answer:
A
Explanation:
The top answer is correct, over time it has become weaker.
Answer:
Marco polo worked as an administrator for 17 years.
Explanation:
Upon reaching China, Marco Polo entered the court of powerful Mongol ruler Kublai Khan, who dispatched him on trips to help administer the realm. Marco Polo remained abroad for 24 years