From which of the embryological germ layers is the epithelial tissue derived

(I) ectoderm

(II) mesoderm

(III) endoderm

(1) I & II are correct

(2) I & III are correct

(3) II & III are correct

(4) I & II & III are correct

Assertion   :       Embryonic development proves interrelationship and common ancestory of metazoans.

Reason      :       It involves similar sequence of five dynamic processes during development.

Assertion   :       There is generally monospermy in most of animals.

Reason      :       Vitelline membrane of ovum checks polyspermy.

Assertion   :       Penetration of sperm into ovum is a chemical process.

Reason      :       Acrosome of sperm secretes a lytic enzyme hyaluronidase which dissolves vitelline membrane of ovum.

Assertion :     Cleavage is also called fractionating process.

Reason    :     In cleavage, number of blastomeres increases but size of blastomears decreases.

Assertion   :       Nuclear-cytoplasmic ratio decreases in cleavage.

Reason      :       During cleavage, cytoplasmic synthesis is faster than DNA synthesis.

Assertion   :       Implantation is the process of attachment of blastocyst on uterine endometrium.

Reason      :       Implantation is controlled by trophoblast and occurs by decidual cell reaction.

Assertion   :       Gastrular movements are morphogenetic.

Reason      :       During gastrulation, cells move in masses and towards definite direction.

Assertion   :       Asexual reproduction is also called blastogenesis.

Reason      :       In asexual reproduction, there is no  fusion of gametes.

Assertion   :       Sexual reproduction is advantageous than asexual reproduction.

Reason      :       It is rapid mode of reproduction while asexual reproduction is slow mode of reproduction.