Natural selection results in different forms of plants which can survive in contaminated or uncontaminated soil. Type of natural selection is

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#Question id: 5557

#5. Developmental Biology

The plasma membrane of the sea urchin egg ________.

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#Question id: 5558

#5. Developmental Biology

Fertilization of an egg without activation is most like ________.

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#Question id: 5559

#5. Developmental Biology

During fertilization, the acrosomal contents ________.

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#Question id: 5560

#5. Developmental Biology

In a newly fertilized egg, the vitelline layer ________.

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#Question id: 5561

#5. Developmental Biology

In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are ________.

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#Question id: 5562

#5. Developmental Biology

In an egg cell treated with a chemical that binds calcium and magnesium ions, the ________.