Because the egg will attach to the the female wall and develop itself.
The jelly coat makes sure that only one sperm cell can enter the egg cell.
The egg cell has a chemical layer around it to stop more sperm cells coming in when a sperm cell comes in
The acrosome layer of sperm cells contain enzymes to break down the outer layer of the ovum to allow penetration by the sperm cell.
First, a sperm identifies an egg, sticks to its jelly-like coating and strips to reveal parts of its cell membrane. In the second phase, the cell membranes of the egg and sperm cling together in an intimate embrace, before fusing to allow the DNA to meet.
Sponges have no nervous systems, their middle jelly-like layers have large and varied populations of cells, and some types of cell in their outer layers may move into the middle layer and change their functions
the die off
The egg cell is much bigger than the sperm.it has a chemical layer around the outside to stop more sperm getting in. It also contains one set of cytoplasm to survive on for the couple of hours it takes the egg cell to reach the womb and form the embryo
The jelly coat makes sure that only one sperm cell can enter the egg cell.
The egg cell has a chemical layer around it to stop more sperm cells coming in when a sperm cell comes in
The male produces sperm cells, which carry his genes. The sperm cell meets an egg cell from the female which carries her genes. The sperm cell penetrates the egg's outer layer. This is called "fertilizing" the egg. Normally, the outer layer of the fertilized cell thickens, so no more sperm cells can enter it. The fertilized egg then travels to the woman's uterus, where it attaches to the wall of the uterus and ultimately develops into a fetus.
The acrosome layer of sperm cells contain enzymes to break down the outer layer of the ovum to allow penetration by the sperm cell.
First, a sperm identifies an egg, sticks to its jelly-like coating and strips to reveal parts of its cell membrane. In the second phase, the cell membranes of the egg and sperm cling together in an intimate embrace, before fusing to allow the DNA to meet.
An acrsome is an organelle that develops over the anterior half of the sperm's head. Its purpose is to break down the outer layer of the ovum so the sperm can join the egg.
Sponges have no nervous systems, their middle jelly-like layers have large and varied populations of cells, and some types of cell in their outer layers may move into the middle layer and change their functions
Cytoplasm-A jelly liquid that holds the items inside a cell.
jelly inside a cell where the cell is activites happen
Sperm cells are animal cells.