Answer:
A meter is a metric unit of length used worldwide by scientists to measure lengths and distances between objects.
I think the answer is A) steroids
Hope this helps!
Answer:
(d). B-cells.
Explanation:
Adaptive immunity can be described as immunity which develops in response to exposure to a pathogen (or foreign molecule). throughout the life. It is divided into two types, humoral immunity and cell-mediated immunity.
Humoral immunity is mediated by B cells that secrete antibodies against particular antigens. These antibodies recognize and neutralize the antigens and activate cell-mediated immunity, which is mediated by T cells.
Thus, the correct answer is option (d).
I believe its D. It becomes more difficult for the cell to get enough oxygen and nutrients.
C Fossils allow scientists to have an idea of the time scale that traits evolved.
