Ils se produisent à travers quatre étapes essentielles du développement animal précoce: Fertilisation: processus consistant à combiner un seul spermatozoïde avec un seul ovule pour former un zygote. Clivage: cycles multiples et rapides de division cellulaire mitotique où la taille globale de l'embryon n'augmente pas. L'embryon en développement est appelé blastula une fois le clivage terminé. Gastrulation: le réarrangement (mouvement) spectaculaire des cellules de la blastula pour créer les couches de tissu embryonnaire. Ces couches de tissus continueront à produire les tissus et les organes de l'animal adulte. Organogenèse: processus de formation d'organes et de tissus via la division et la différenciation cellulaire.
They occur through four essential stages of early animal development: Fertilization: the process of combining a single sperm with a single egg to form a zygote. Cleavage: multiple and rapid cycles of mitotic cell division where the overall size of the embryo does not increase. The developing embryo is called a blastula after cleavage is complete. Gastrulation: the spectacular rearrangement (movement) of the blastula cells to create layers of embryonic tissue. These layers of tissue will continue to produce the tissues and organs of the adult animal. Organogenesis: process of organ and tissue formation via cell division and differentiation.
<em><u>I </u></em><em><u>used</u></em><em><u> </u></em><em><u>Google </u></em><em><u>tr</u></em><em><u>anslate</u></em><em><u> </u></em><em><u>for</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em>
<em><u>j'ai utilisé google translate pour cela</u></em>
Adding or removing a species from n eco system
can lead to an imbalance ecosystem for the reason that a species might be
surviving due to another one or some species might be playing the role of check
and balance for another, removing that species will cause that check and
balance to stop.
<span>A simple hypothetical example is that a lion
eats deer, when you remove a lion from that system the number of deer will rise
incredibly which will need more vegetation for them, resulting as there will no
vegetation be left leading to some other effects and the chain continue…</span>
Answer:
Predators
Explanation:
Because they eat all the meat so if they wanted to they could eat the predators controlling the lesser amount
Environmental agents such as a drug, chemical, virus or other factor that produce a birth defect are known as teratogens. The correct option in regards to the given question is option "C". The mother of the child can be exposed during her pregnancy to something in the environment that can be the reason for defective birth of a child.Teratogen is an agent that has the power to disturb the growth of an embryo or fetus. This agent also has the power of creating a miscarriage or permanently stopping the process of pregnancy. Radiations can be another cause for teratogen.
Your heart is the power of your nervous system...without it you would not be alive, so when there is anything wrong with your heart, your whole body, nervous,and circulatory systems go all 2hack