Which of these animals was unable to adapt to a warmer climate?
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Ответ:
Ответ:
Ответ:
Morula
Explanation:
The general meaning of blastocyst is a hollow cavity and thus it is the correct term which defines a hollow cellular mass that develops with the first week of fertilization. While morula is the stage in embryogenesis that comes before the blastocyst stage but at this stage there are 16 undifferentiated solid cells therefore Morula is incorrect choice for this answer.
Fetus is an advanced stage of embryo and thus it is also incorrect.
Placenta is a tube which connect the fetus with the mother for exchange of food and nutrition. Thus it is also incorrect