Answer:
Option (d).
Explanation:
Immunity may be defined as the ability of individual to fight against the pathogens. The main cells that are involved in the immunity are B cells and T cells.
B cells produce two types of cells - plasma cells and memory cells. Plasma cells multiply rapidly whereas memory cells will create the memory of the pathogen and protect the body against the pathogen at second time. Memory cells not the plasma cells on the reexposure of pathogen.
Thus, the correct answer is option (d).
I believe all of them apply to proteins.
Answer:
Undifferentiated inner cell mass
Explanation:
Human embryo has two types of cells in its initial stage, trophoblast and inner cell mass. Trophoblast forms the placenta and inner cell mass form the entire human body. Inner cell mass are pluripotent in nature i.e. they can give rise to any body part under right conditions.
Embryonic stem cells are derived from the inner cell mass. They are derived from pre implantation embryo since after implantation the inner cell mass begins to differentiate. Embryonic stem cells can replicate indefinitely without differentiating. They can give rise to all the three germ layers: ectoderm, mesoderm and endoderm. They can treat a number of disorders like genetic disorders, Parkinson's, spinal cord injury, cancers etc.
Answer:
The answer to Your Question Is down below :)
Explanation:
Working with mice, scientists have discovered that a particular protein helps nerve cells extend themselves along the spinal cord during mammalian development.
D. It must go from areas of low concentration to high, and this is only achievable with the use of energy, ATP!