Choose the incorrect statement(s):
select one or more:
o lymphatic vessels consist of different layers that comprise the capillary bed.
o lymphatic vessels contain valves which allow for flow of lymph in one direction.
o each lymph node contains a cortex and a medulla.
o the right thoracic duct drains the right half of the body.
o all of the above statements are incorrect

a. to encourage apoptosis

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers