1. Opening of sodium gates in the plasma membrane
2. Release of binding
3. Spreading of the fertilization cone around the egg
4. Formation of the fertilization membrane
Formation of the fertilization membrane
1. Green algae
2. Ferns
3. Blue green algae
4. Mosses
Blue green algae
1. Chalone
2. Evocator
3. Interlaminar jelly
4. Pheromone
Evocator
1. Schmidt
2. Spemann
3. Waddington
4. Wolff
Schmidt
1. Cotton
2. gram
3. Wheat
4. Maize
gram
1. Hindleg stumps begin to grow rapidly and forelegs appear
2. Gills disappear and organism uses its lungs
3. Horny jaws and teeth are discarded
4. A tongue is formed
Horny jaws and teeth are discarded
1. Because they add green manure
2. They add niters to soil
3. They make soil porous
4. They add calcium to soil
They add niters to soil
1. Around the archenteron
2. On the floor of the archenteron
3. On the roof of the archentron
4. At the side of the archenteron
On the roof of the archentron
1. Liver
2. Heart
3. Notochord
4. Kidneys
Liver
1. Blastomere
2. Morula
3. Blastula
4. Blastopore
Blastula