Blastopore in frogs development occurs in
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
- During metamorphosis, the disappearance of larval organs is called
- A freshly unfertilised egg of hen contains
- Cleidoic eggs are found in
- Which of the following does not show metamorphosis ?
- Sexual reproduction in larval condition is known as
- Laternal line system of sense organs present in the skin of tadpole larva
- The sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called
- In the human female, the primary oocytes remain small without any growth for
- The formation, development and matura- j tion of the female gamete is called
- Metamorphosis is a characteristic feature of
- Human egg is
- Which of the following do not show parental care over their young ones ?
- During the development of frog, the ar-chenteron is formed in
- The nervous system, epidermis and hairs and nails are derivatives of
- In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process…
- Oral contraceptives check
- In forg, the sperms released from the testis take the following route to reach the ureter:
- The intestine of tadpole is
- For fertilization of the frog's egg
- Grey cresent is present in
- Blastopore in frogs development occurs in
- The formation of the neural tube is known as
- If an unfertilized frog's egg is pricked with a micro-needle, it will
- The substance fertilizin is secreted by
- Oogonia entering the growth phase of oogenesis is called
- In the growing oocyte, the nucleus enlarges in size due to an increase in
- How many cleavages are completed in 16 cell stages of frog's egg ?
- The first phase in the sexual reproduction of organisms is
- During fertilization the spermatozoa penetrate through the egg membranes with the help of
- Development of egg without fertilization is termed as