The correct answer is air pollution
Eukarya. This is because their cells all have a nucleus. While prokaryotes like archaea and bacteria don't have one, eukarya have a nucleus.
Answer: They are sterile
Explanation:
Mule is a hybrid of male donkey and female horse with different chromosome number and is considered superior to both horse and donkey. Still it is considered as a weak hybrid this is because the mule is sterile which means that it cannot reproduce further.
The mule though is superior in many ways such as it can jump and is strong. The hybrid of mule is not good as it cannot continue its next generations on earth.
They are sterile and so is a weak hybrid.
Answer:
The Sun
Explanation:
it is essential to doing photosynthesis