Answer:
The correct answer is- Large intestine
Explanation:
Vitamin K is an very essential vitamin that is required by the body to produce many clotting factors for example clotting factor II, IX, X, etc.
Green vegetables are the primary source of providing vitamin K1(phylloquinone) and vitamin K2(menaquinones) is synthesized in the body by some bacteria which is present in the large intestine.
Bacteria such as E.coli are capable of synthesizing vitamin K2 in large intestine from where it is absorbed in lymph present in the intestine. So the correct answer is the large intestine.
<u>d) observing how the heart contracts to pump blood
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Answer by JKismyhusbandbae: Repeated drug use may lead to drug tolerance which occurs when a user requires larger amounts of the drug to achieve the desired effect.