7REG. Science 3.3 Both sexual and asexual reproduction involve cell division
asexual reproduction
one organism produces one or more new organisms that are identical to itself and that live independently of it. Usually unicellular organisms reproduce this way.
offspring
the new organism
Parent
the organism that produces the new organism
Regeneration as asexual reproduction
Ex starfish is cut in half. Each half will regenerate this missing body part to form 2 complete independent and identical starfish. Also growth of plants by cutting piece off is example.
Generation time
Time it takes for one generation to produce offspring. Example bacteria generation time is very fast so you can feel fine in morning but are sick by afternoon.
Is cell division and reproduction by binary fission the same process in prokaryotic organisms
Yes because they are single celled
Regeneration
A process of new tissue growth in multicellular organisms.
Asexual vs sexual reproduction
Asexual: Cell Division, one parent, rate of reproduction is rapid, offspring genetically identical to parent. Sexual: Cell Division and other processes, two parents, rate of reproduction is slower, offspring have genetic material from both parents.
Sexual reproduction
Involves 2 parents and occurs in multicellular organisms.
Is mitosis and cytokinesis in multicellular organisms considered a method of reproduction
No. because the new cells cannot live independent lives. ex. new skin cells are part of skin tissue and cannot live independently.
budding
Occurs in both unicellular and multicellular organisms. the organisms develop tiny buds on its body that is genetically identical to the parent. Eventually most buds break off and live independently of the parent.
Single celled eukaryotic organisms asexual reproduction
done through mitosis and cytokinesis. Ex is algae and paramecium
binary fission
form of asexual reproduction occurring in prokaryotes. occurs when the parent organism splits in two, producing two completely independent daughter cells genetically identical to the parent cell.