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How does biological diversity relate to the characteristics ofthe abiotic factors of an ecosystem?
How do diversity factors in an ecosystem work together to produce the diversity and evolutionary differentiation?
15. The sea urchin embryo contains a signalling centre at the vegetal pole.
a) What is the name of this group of cells?
b) Describe an experiment demonstrating that these cells have signalling properties.
c) Which tissue is formed under the influence of this signalling centre?
d) You isolated molecules from the vegetal pole signalling center of the sea urchin and injected them into the ventral side of a Xenopus blastula, what would be the phenotype of this Xenopus embryo? Explain.