I believe the answer is sister chromatids in a chromosome.
To be exact 23 pairs of sister chromatids.
Hope this helps .
Answer:
on bird beaks?
Explanation:
I do know that the bird's beaks that they are born with will in time evolutionize their beaks size and strength to prey on the type of fish for food over time.
Hope I'm making sense...good luck.
Answer:
Actin filaments return to their original positions (does not occur in muscle contraction, according to the sliding filament model).
Explanation:
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).
