The Cambrian Explosion is when diverse animals were first recorded as fossils.
"The mutant will not be able to grow on lactose" is the one thing among the following choices given in the question that will be observed if mutation occurs in the gene for the lac repressor and results in a repressor thatdoes not bind lactose. The correct option among all the options that are given in the question is the first option.
The right option is c. narcotic
Tylenol
iii with codeine belongs to the group of medications called narcotic analgesics
(pain relievers). Narcotics are drugs that are administered to provide relief
from severe pain. Narcotics are sometimes prescribed when other forms of pain
relievers are not working. Examples of narcotics are hydrocodone, codeine, tramadol
and opium.
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.
