Answer:
The answer is option a.progesterone, c.estrogen and option d. human chorionic gonadotropin.
Explanation:
These hormones serve various functions.
I. Human chorionic gonadotropin: this signals the mother that pregnancy has occurred by maintaining the production of progesterone from the corpus luteum. This is what is detected during a pregnancy test.
ii. Progesterone maintains the pregnancy by supporting the lining of the uterus.
iii. estrogen stimulates the growth of the womb to accommodate the growing fetish.
A vector of a zoonotic pathogen differs from a host of the pathogen in that it is not affected by the pathogen.
<h3>What are vectors and pathogens?</h3>
Vectors are organisms which serve as carriers of disease-causing organisms known as pathogen. Vectors usually serve as transport or transit mechanisms by which diseases spread.
Pathogen are organisms that cause disease. A zoonotic pathogen is a pathogen that can move from non-human animals to humans.
The vector of a zoonotic pathogen differ from a host of the pathogen in that the vector is not affected by the pathogen and the vector is also non-human.
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The fertility rate of 2.1 with which populations are expected to eventually stabilize is known as the long-term replacement rate. In other words, if a nation maintains a fertility rate of 2.1 over a long period of time the population of that nation will eventually stabilize and it will neither grow nor shrink. Immigration allows the people to grow faster than the fertility rate would suggest. Also because of past growth, the population is younger than it would otherwise be. This means that there are more potential mothers and fathers. Only after its residents age can the population of a country stabilize.
