The embryo at 16 celled stage is known as
morula
gastrula
blastula
blastomere
A.
morula
Morula is the embryo at the 16 celled stage. It is a mass of cells resulting from the cleavage of the ovum before the formation of a blastula.
Blastomere is any type of cell produced during cleavage.
Blastula is the early developmental stage of a metazoan, following morula stage and consists of single, spherical layer of cells that encloses a hollow, central cavity.
the group of Anamniota includes
reptiles and birds
birds and mammals
fishes an amphibians
reptiles and mammals
Which of the following provides most evident proof of evolution?
Fossils
Morphology
Embryo
Vestigial organs
In rabbit, head of epididymis present at the head of testis is called
vas deferens
cauda epididymis
gubernaculum
caput epididymis
Which of the following is not vestigial in man?
Tail vertebrae
Nails
Nicitating membrane
Vermiform appendix
Animals undergoes inactive stage during winter, is known as
aestivation
hibernation
adaptation
acclimatization
Small fish get stuck near the bottom of a shark and derives its nutrition from it. This kind of association is called as
antibiosis
commensalism
predation
parasitism
