In the adult phase of a frog,which of the following characters becomes degenerate?

On removing the thyroid gland from a tadpole,it will:

The development of the eye in vertebrate embryology is studied under which of the following processes?

Which of the following is a correct statement?

The blastopore develops into the future

If the ectoderm from the neural tissue area is removed from the embryo and transplanted in place of the presumptive belly ectoderm,the embryo will develop: