Select the correct image.
the images show the stages of human development. at which stage does cell differentiation start?

Image 2

Explanation:

It's where the cells begin dividing

Glastulla:

This blastula implants into uterus called glastulla.

Embryo:

Glastulla cells begins to differentiate and develops into embryo.

Explanation:

Human Development:

Human Development takes about 266 days which is around 9 months. In this time fertilized egg develops in to baby. This whole development is divided into three trimesters lasting about three months each.

Fertilization:

Ovum female sex cell fertilized with sperm which is male sex cell.

Zygote:

After fertilization this cell is called zygote.

Morula:

Zygote divides and ball of cells called morula.

Blastocyst:

Morula develops into cells with hollow cavity called blastocyst.

Glastulla:

This blastula implants into uterus called glastulla.

Embryo:

Glastulla cells begins to differentiate and develops into embryo.

Fetus:

After eight weeks this embryo is considered as Fetus.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

the answer is c.) there is a warm front in region a and a stationary front in region b.