Which observation is not evidence that supports the theory that mitochondria and chloroplasts originate from symbiotic bacteria?

#Question id: 7175

#Unit 5. Developmental Biology

The primitive streak is derived from epiblast cells and the central cells of Koller’s sickle. As the primitive streak extends rostrally, Henson’s node is formed. Following are few statements regarding this:

A. As endodermal ingression continues, the primitive streak starts to regress, moving Henson’s node from near the center of the area pellucida to a more posterior position.

B. As endodermal ingression continues, the primitive streak starts to regress, moving Henson’s node from near the periphery of the area pellucida to a more posterior position.

C. As mesodermal ingression continues, the primitive streak starts to regress, moving Henson’s node from near the center of the area pellucida to a more posterior position.

D. As mesodermal ingression continues, the primitive streak starts to regress, moving Henson’s node from near the periphery of the area pellucida to a more anterior position.

Which of the following statements are correct?

#Question id: 1838

#Unit 4. Cell Communication and Cell Signaling

What is the single most commonly used term to describe the exchange of genetic material between viruses that infect different species?

#Question id: 4626

#Unit 11. Evolution and Behavior

Neo-Darwinism suggest evolutionary concept by

#Question id: 1390

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements describes the events of apoptosis?

#Question id: 7584

#General Aptitude