What part of the embryo does the trophoblast develop into? Complete Select one:

Question

What part of the embryo does the trophoblast develop into? Complete Select one: 0.00 points out of 1.00 a. the ectoderm b. the endoderm c, it does not become part of the embryo d. the inner cell mass e. the mesoderm Flag question Question 9 Complete 0.00 points out Watch the "Mitosis animation" video on the iLearn site and select the CORRECT response. Select one of 1.00 a. Cytokinesis is the last stage of mitosis. b. S phase is the stage when microtubules attach to duplicated chromosomes c. Each sister chromatid has a kinetochore, a protein structure attached to the centromere. d. Separation of the sister chromatids occurs by the spindle microtubules lengthening in anaphase. e.All of the statements are correct. Flag

Explanation / Answer

Q. 8. It doesnot become a part of embryo.

Trophoblast is the cell mass which supply the nutrient to the developing embryo. Trophoblast, along with extraembryonic mesoderm is responsible for making the chorionic membrane. Chorionic sac transfers nutrients and other necessary biomolecule from mothers blood to the foetal blood.

Q9. All of these statements are correct

Cytokinesis is followed by karyokinesis(division of nucleus) and is the last phase of cell division.

In S phase , microtubule attach to the duplicated chromosome in order to move chromosome to the poles.

Kinetochore is the site where microtubule attaches. So each of them has their own kinetochore.

And spindle microtubule seperates the sister chromatids and move them towards the pole in anaphase stage.  

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