The mesoderm gives rise to [A] the lining of the digestive tract, respiratory tr

Question

The mesoderm gives rise to [A] the lining of the digestive tract, respiratory tract, pancreas, and liver. [B] the nervous system, including the eyes and ears. [C] structures derived from skin, such as hair, feathers, nails or claws. [D] heart, blood vessels, muscle, and bones. [E] All of the above When the blastopore dorsal lip is grafted from one frog embryo onto a second embryo, the second dorsal lip will [A] change the polarity of the adjacent segments. [B] block gastrulation. [C] change the developmental fate of the surrounding cells. [D] change the prospective potency of the surrounding cells. [E] cause rapid cell division. Which of the following techniques can be used to show genomic equivalence [A] RNAi [B] Nucleic acid hybridization [C] Induction [D] In vitro fertilization [E] RFLP mapping Gastrulation is the stage of development [A] when neural tube formation begins. [B] that makes possible the inductive interactions that trigger differentiation and organ formation. [C] that follows the formation of the three germ layers. [D] that precedes cleavage. [E] that is marked by a dramatic increase in the rate of mitosis.

Explanation / Answer

ans 1 D)mesoderm give rise to heart,blood vessels,muscles and bones as it is inner most layer .or endoderm give rise to the lining of digestive tract,respiratory sytem,pancreas and liver.ectoderm give rise ti nervous stem ,including eyes and ears,structures derived from skin,such as hair,feathers,nails or claws.

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