Operator genes are controls to which gene mechanism?
Structural gene
Activator gene
Regulator gene
Modulac gene
Type of blastula in chick is
discoblastula
coeloblastula
amphiblastula
holoblastula
A.
discoblastula
Blastula is an animal embryo at the early stage of development when it is a hollow ball of cells. In chicks, discoblastula is found. It is a modified blastula found in telocithal eggs.
Coeloblastula is a type of blastula found in Coelenterata, lower arthropoda, Echinodermata etc.
Amphiblastula is a poriferan larva.
DNA is specific because it has
number of nucleotides
specific nature of phosphate and sugar
arrangement of protein in DNA
specific nature of purine and pyrimidines
When embryonic development is completed in mother but the embryo not accept nutritent from mother, which is known as
ovoviparous
viviparous
oviparous
All of these
Sertoli cells are associated with
kidney of rabbit
ovary of frog
testis of rabbit
ovary of rabbit