Reproduction at the cell level

[Bernard NebelKeymaster]

Organisms being comprised of cells, have kids consider: How does the life of a new organism start. In the case of sexual reproduction, observations reveal that it starts with fertilization, the entry of a sperm cell into an egg cell and the combining of the egg and sperm nuclei to form the zygote, the first cell of the new the new individual. Subsequent cell divisions, growth, and differentiation of cells lead to the new individual. The sea urchin provides an example in which this process is easily observed: (You can ignore details) Post questions.

https://www.youtube.com/watch?v=LKaam4zW0Uk (continues to more advanved development)

Development of chicks within the egg provide another example

Asexual reproduction

Asexual reproduction is reproduction without involvement of eggs or sperm.  Cells in some part of the organisms parent body simply divide, grow, and differentiate in a way that gives rise to another individual. Strawberry plant provide an example as seen in the following video:

For survival of the organism over the long term: see the text for relative advantages and disadvantages of sexual versus asexual reproduction (Please post questions)

[Author]

Posts