Download This week in science 6th - Reproduction

ThisWeekin
Science
Mode of Reproduction
4th Grading Period, Week 6 - 6th Grade
A
We will learn about …
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Pollination
External
fertilization
Internal
fertilization
Binary fission
Spores
Budding
Mode of Reproduction
Mode of reproduction is a basic characteristic of organisms.
Reproduction is the process by which adult organisms produce
offspring. The process is either asexual or sexual. Organisms
can be classified by their mode of reproduction.
Parent and offspring
Asexual Reproduction
In asexual reproduction, one parent produces offspring.
Three types of asexual reproduction are: binary fission, spores,
and budding. Binary fission is used by all prokaryotes and some
eukaryotes. In binary fission, the living cell divides into two
cells each of which is genetically identical to the original cell.
Spores are unicellular and are produced by eukaryotic organisms
such as, some plants, fungi, and some microorganisms. In
budding the offspring grows out of the body of the parent.
Budding
Sexual Reproduction
In sexual reproduction, two parents produce offspring. Three
types of sexual reproduction are: pollination, external
fertilization, and internal fertilization. Pollination occurs in
plants and can be self-pollination or cross pollination. It requires
the transfer of pollen from the anther to the stigma. External
fertilization occurs when a female animal lays eggs and the male
animal deposits sperm to fertilize the eggs. Internal
fertilization occurs when the egg is fertilized inside the female.
Corral spawning.
Spores
Binary Fission