Parity rules by Erwin Chargaff are given below match them correctly

A	B
1. First parity rule	a. GC Rule- GC content tends to be greater in exons than in introns
2. Second parity rule	b. Cluster rule – Purines in nontemplate strand applies more closely to Exons
3. Third parity rule	c. Rule of Equal amount applies more closely to introns than to exons
4. Fourth parity rule	d. Rule of complementarity

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#Question id: 5555

#Unit 5. Developmental Biology

The formation of the fertilization envelope requires an increase in the cytosolic concentration of ________.

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#Question id: 5556

#Unit 5. Developmental Biology

Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief ________.

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#Question id: 5557

#Unit 5. Developmental Biology

The plasma membrane of the sea urchin egg ________.

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#Question id: 5558

#Unit 5. Developmental Biology

Fertilization of an egg without activation is most like ________.

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#Question id: 5559

#Unit 5. Developmental Biology

During fertilization, the acrosomal contents ________.

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#Question id: 5560

#Unit 5. Developmental Biology

In a newly fertilized egg, the vitelline layer ________.