Answer:
Because animals don’t have the same body as humans and animals are different from humand
Explanation:
<span>whether the mouth is developed from the first or second opening.</span>
An embryo with meroblastic cleavage, extraembryonic membranes, and a primitive streak must be that of a option(c)i.e, bird.
Mesoderm is produced by the primitive streak, and it eventually becomes mesenchyme (embryonic connective tissue). Around growing organs, mesenchyme develops into a packing tissue before becoming connective tissues and muscles. With birds, we start to witness the embryos develop in a meroblastic manner, with a lot more yolk than usual. Cell mobility is also unusual because the cells in birds lie more in sheets than in balls.
A longitudinal thickening of cells along the blastoderm of large-yolked eggs forms the primitive streak during ingression, through which potential chordamesoderm and mesoderm cells move inward. Cells of the hypoblast are replaced by endodermal cells. Through ingression, the embryo develops longer and fills more of the region pellucida, lengthening the original stripe over the surface of the yolk. Following gastrulation, the neural tube and its supporting components are formed during the process of neurulation.
Learn more about primitive streak here: brainly.com/question/13153357
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Answer:
The term homeostasis refers to balance, where an organism seeks to maintain the balance of the temperature of its organism in order to persist in life.
There are organisms that are considered ectotherms, with which they release heat to the external environment in order to balance said increase in temperature and not denature their own proteins (such as enzymes, structural proteins, receptors, second messengers, etc.). On the other hand, in the case of endotherms, take energy from the medium to increase your body temperature and maintain it, since otherwise you could enter hypothermia.
In the human organism these principles occur both, not simultaneously, but according to the external temperature in which the human is, ectothermic / catabolic processes in heat stages and endothermic or anabolic processes in the cold stage.
Explanation:
In simple words, endotherm is the heat taken from the medium and exotherm or ectotherm is the release of heat to the medium.
This is so simple in objects, but in living organisms these processes have a reason, and that is why we explained above, when looking for a constant temperature these processes are responsible for mediating balance.