There are two types of probability distribution which are used for different purposes and various types of the data generation process.

a. Normal or Cumulative Probability Distribution

b. Binomial or Discrete Probability Distribution

TLS Online TPP Program

#Id: 1591

#Unit 5. Developmental Biology

Hensen’s node (Primitive Knot)

TLS Online TPP Program

#Id: 1592

#Unit 5. Developmental Biology

A regional thickening of cells at the anterior end of the primitive streak

TLS Online TPP Program

#Id: 1593

#Unit 5. Developmental Biology

Hensen’s node is the functional equivalent of the organizer (dorsal lip of the amphibian blastopore)

TLS Online TPP Program

#Id: 1594

#Unit 5. Developmental Biology

Primitive Pit 

A funnel-shaped depression at the center of Hensen’s node through which cells migrate to form the notochord and prechordal plate.

TLS Online TPP Program

#Id: 1595

#Unit 5. Developmental Biology

The primitive streak defines the major body axes of the avian embryo. 

TLS Online TPP Program

#Id: 1596

#Unit 5. Developmental Biology

The axis of the primitive streak is equivalent to the dorsal-ventral axis of amphibians.