The formation of the fertilization membrane requires an increase in the availability of
A) bicarbonate ions.
B) calcium ions.
C) hydrogen ions.
D) potassium ions.
E) sodium ions.
Answer: B
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Biology
- During the early part of the cleavage stage in frog development, the rapidly developing cells
- As cleavage continues during frog development, the size of the blastomeres
- The pattern of embryonic development in which only the cells lacking yolk subsequently undergo cleavage is called
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- In a developing frog embryo, most of the yolk is
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- A human blastomere is
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- Fertilization normally
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- From earliest to latest, the overall sequence of early development proceeds in which of the following sequences?
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- The vitelline layer of the sea urchin egg
- During fertilization, the acrosomal contents
- Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief
- A reproductive difference between sea urchins and humans is
- A human zygote undergoes its first cell division
- A sea urchin zygote undergoes its first cell division
- Even in the absence of sperm, metabolic activity in an egg can be artificially activated by
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