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as soon as a single sperm fertilises the ovum a change of composition takes place in ovum's outer layer forming zona pellucida which prevents the penetration of other sperms.
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How does the ovum prevent multiple penetrations of sperm cells along it's periphery?
The ovum has a protective layer called the zona pellucida that hardens after the entry of one sperm cell, preventing additional sperm cells from penetrating. This process is known as the zona reaction and ensures only one sperm cell fertilizes the egg.
Core and periphery model-India?
The core goes along the coast of India with cities like Mumbai, Pune, Bangalore, Chennai, Hyderabad. Also there is another core around the capital city New Delhi. The periphery is inland with Madhya Pradesh and other cities inland are the periphery where primary industries are dominant.
What is difference between bevel gear and worm wheel?
A bevel gear is cone shaped with the gear teeth placed vertically along the periphery. A worm gear is barrel shaped with the teeth spiraling along the length like a screw.
What is the opposite of radially?
Tangential.
Where are some areas that still have volcanoes?
There Are multiple volcanoes along the ring of fire. (along the pacific coast)
What is a bank built along a river to prevent flooding?
Dam
Why did Stalin create a zone of friendly governments along the soviet bored er?
He wanted to prevent an invasion.
What is the closest town to the Sahara desert?
The Sahara Desert covers a huge area - almost the top 1/3rd of the African continent. There are a number of villages, towns and even cities located within the desert, but in most cases along the periphery
What moves cell parts along microtubule?
Motor proteins, such as kinesin and dynein, move cell parts along microtubules by utilizing energy from ATP hydrolysis to generate mechanical force. Kinesin generally moves cargo towards the cell periphery, while dynein moves cargo towards the cell center.
How people benefit from the dams along the Colorado River?
They prevent flooding and produce electricity.
What warm current moves west along the equator in the North Atlantic?
Gulf SteamA gyre current is a system of four currents completing a flow circuit around the periphery of an ocean basin. This gyre current would be called the North Atlantic gyre.
An area along a stream bank that helps prevent soil erosion is an example of?
a buffer zone
