In fetal life, the lungs are not expanded, so most of the blood from the right ventricle is shunted from the pulmonary artery to the aorta through the patent ductus arteriosus. With a few breaths the lungs expand, and blood flows from right ventricle to pulmonary artery into the lungs. Withdrawal of circulating prostaglandin from the mother plus bradykinins released from the expanding lung of the infant cause the ductus to close over a few minutes to hours. The closed ductus remains as the ligamentum arteriosum.
I think the answer is Specialized cells!
A human fetus develops at the mother’s body temperature. At birth, most newborns experience a drop in temperature, and their bodies must quickly do something about it. What they do is the same thing a hibernating mammal does as it rouses itself from its winter "snooze." During hibernation, an animal’s body temperature is low. In order to move about and take care of itself once awake again, the animal that has been hibernating must raise its body temperature. (William k. Purves et al., life: the science of biology) The definition is the primary pattern of organization in this passage.
This passage is explaining the process of hibernation and its importance in the animal life cycle.
To learn more about hibernation here
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None of those options are correct.
Fungi produce,naturally, antibiotics that will kill or inhibit the growth of bacteria.
This is useful for them to limit competition in their natural environment but it's also useful for us because it will kill bacteria that cause us infections.
The only thing scientists had to do is isolate that antibiotic.
Some antibiotics that were developed from fungi: penicillin and cephalosporins.
The correct answer is A !