Question

what happens to cells that fold inside the blastula during gastrulation in a triploblast? select the three that apply. what happens to cells that fold inside the blastula during gastrulation in a triploblast?select the three that apply. they become mesoderm. they form the lining of the gut cavity. they are not necessary to the animal after gastrulation. they are in contact with the mesoderm. they become endoderm. they become ectoderm. they are continuous with the mesoderm

Answer 1

During gastrulation in a triploblast, the cells that fold inside the blastula become mesoderm, form the lining of the gut cavity (endoderm), and are in contact with the mesoderm. These cells do not become ectoderm nor are they considered unnecessary after gastrulation.

Step-by-step explanation:

During gastrulation, the cells that fold inside the blastula in a triploblast undergo significant developmental changes. These cells:

1. Become mesoderm, which is the middle layer of cells that will differentiate into various structures including muscles, the circulatory system, and the lining of body cavities.
2. Form the lining of the gut cavity, which is the future digestive tract, and is a role typically assigned to the endoderm.
3. Are in contact with the mesoderm, since during the folding process, cells that will form mesoderm come in contact with both the ectoderm and endoderm layers.

The cells that fold inside do not become ectoderm, which forms the skin and nervous system and lines the exterior of the body. They also are not considered unnecessary after gastrulation, as each germ layer contributes essential functions for the developing organism.

Answer 2

During gastrulation in a triploblast, cells that fold inside the blastula can become mesoderm, form the lining of the gut as endoderm, and will be in contact with the mesoderm.

Step-by-step explanation:

During gastrulation in a triploblastic organism, the blastula undergoes significant changes as it folds inward. This process results in the formation of the three primary germ layers known as the ectoderm, mesoderm, and endoderm. When cells fold inside the blastula during this process:

• They can become mesoderm, the middle germ layer, which differentiates into many internal structures such as muscles, blood vessels, and connective tissues.
• Some of these cells will form the endoderm, the innermost germ layer, which gives rise to the lining of the digestive tract as well as other organs like the liver and lungs.
• These cells are in contact with the mesoderm as they are part of the process of forming the middle germ layer.

It is important to note that these cells do not become ectoderm (the outermost layer responsible for forming skin and the nervous system) and are not deemed unnecessary after gastrulation; they play a critical role in the continuous development of the embryo.