The mitochondria in the neck and middle piece.
Mitochondria are located in the tail of the sperm. They provide the sperm with that whip like energy to move. They can give the energy to the sperm because mitochondria are the "powerhouse" of the cell.
This is kinda gross. I suppose they have a flagella so they can "swim" up the vagina to find the egg. No other cell needs to "swim." The flagella acts as a tail.
Earth's movement through cometry dust is the main reason for meteor showers.
The Euglena are unicellular organisms with flagella. These flagella are long whip-like tailsused for movement
a ion tail or a dust tail
it allows the sperm to swim
The tail of the sperm cell
Mitochondria are located in the tail of the sperm. They provide the sperm with that whip like energy to move. They can give the energy to the sperm because mitochondria are the "powerhouse" of the cell.
A white tail is a mammal. Characterized by it's fur coat and warmblooded (meaning it generates it's own body heat) and sexual reproduction.
The tail of a sperm, called a flagellum, is made of proteins.
The Enlightment/Tail end of the rococo movement.
Sperms have tail and they swim. Terrestrial condition does not permit that. So, it is best to have internal fertilization where sperms can creep up the lining of the female reproductive tract, rich in mucus, and find the ovum to fertilize.
you can usually pick up on how they feel by looking at their tail. eg, lots of movement; she's annoyed. not movement at all; content. tail in the air with tip flicking; interested
Maybe what you mean is it's use it is used for movement and it is well developed
Flagella or Flagellum
It's a communication to other squirrels.
Some have tiny hairs or a tail, which can be used for movement.