Question

Which of the following processes occurs first in embryos?
(a) Neurogenesis
(b) Notogenesis
(c) Hepatogenesis
(d) Cardiogenesis

Answer 1

Hint: A multicellular organism's embryo is the first stage of development. Embryonic development is the stage of the life cycle that begins shortly after conception and continues through the production of bodily structures such as tissues and organs in sexually reproducing animals.

Complete answer:
The neural plate of the trilaminar embryo is separated from the ectoderm by folding to form the neural groove, which later fuses to form the neural tube (the central nervous system progenitor, the brain and spinal cord) and accompanying neural crest.
The development of the notochord by epiblasts that construct the amnion cavity's floor is known as notogenesis. During gastrulation, the notochord arises and soon after causes the creation of the neural plate (neurulation), synchronising the neural tube's growth.
The term cardiogenesis refers to the embryonic development of the heart. The company's name comes from this word, as well as scientific evidence that TMR encourages the creation of new blood vessels in heart tissue.
Hepatogenic is the origin or created in the liver.
Morphogenetic motions occur during gastrulation. Ectoderm is formed as a result of these morphogenetic actions. The ectoderm is the germ layer on the outside. It invaginates on the inside, giving rise to the neural tube, and therefore the neurogenesis process begins first.

As a result, the correct answer is 'Neurogenesis.'

Note: This union marks the start of the prenatal period, which in humans is divided into three stages:
-The pre-embryonic stage, which lasts for the first two weeks of development and is a period of cell division and initial differentiation.
-The embryonic period, or period of organogenesis, which lasts from the third to the eighth week of development.
-The foetal stage, which is marked by tissue and organ maturation as well as rapid bodily growth.