类别 全部 - fertilization - spores - reproduction

作者:Serna García Serna García 3 年以前

190

Reproduction

Seksuell reproduksjon krev eit egg frå ho og sædceller frå han for å danna avkom i mora sin mage. Dette inneber ein prosess der foreldrecelle deler seg for å bli to. I virveldyr skjer befruktninga ved at gametar smeltar saman til ein zygote, som utviklar seg til foster.

Reproduction

Every individual organism is the offspring of a reproduction

Reproduction

Plants sexual reproduction

It is almost the same only that some things change like the sperm because it changes for pollen, but the rest everything happens as in vertebrates

Fertilization process in vertebrates

Fetal development
Zygote Division
Zygote (fertilized egg)
Gametes
In sexual reproduction, a female egg and a seed that comes from the father is needed so that the offspring are formed in their mother's womb.

Sexual Reproduction

No offspring is identical to parents
Fertilization and gametes if included
Two parental cells
Genetically different from their parents

Vs

Asexual Reproduction

All the offspring will be totally the same
Fertilization and gametes are not included
One parental cell
Identical offspring to his mother

How is it ?

What is needed for this is the following is a parental cell, to be able to divide and thus become two

Types of Asexual reproduction

Parthenogenesis
What happens is that female organisms produce an egg without their egg being fertilized
Fragmentation
They are divided into three: the head, the tail and the trunk. From there other worms will come out that also split between three
Budding
What happens is very simple, the offspring grow on top of the adults so that the adults remain below and the offspring remain above
Spores
The spores are like a powder that the ferns generate to reproduce so that the powder hangs below the fern leaves, so when their time to leave they become many because in reality there were millions of cells in a heap, then they are propelled with the air or if they fall into the water they help each other to reach the ground to plant themselves there
Binary Fission
It is called binary fusion because it duplicates your DNA to split in two with the same DNA