Ques: Q: What is the lowest level of organization that can perform all activities required for life? Read this paragraph and choose the correct option from the provided answers: Choices: - organs - nucleii - tissues - the cell A:
Ans: the cell

Ques: Q: Atoms with the same atomic number but different mass numbers are called what? Read this paragraph and choose the correct option from the provided answers: Nuclear chemistry is the study of reactions that involve changes in nuclear structure. The chapter on atoms, molecules, and ions introduced the basic idea of nuclear structure, that the nucleus of an atom is composed of protons and, with the exception of 11 H, neutrons. Recall that the number of protons in the nucleus is called the atomic number (Z) of the element, and the sum of the number of protons and the number of neutrons is the mass number (A). Atoms with the same atomic number but different mass numbers are isotopes of the same element. When referring to a single type of nucleus, we often use the term nuclide and identify it by the notation A where X is the symbol Z X, 14 Often a nuclide is referenced 6 C. example, 146 C is called "carbon-14. Choices: - tropes - organisms - reactions - isotopes A:
Ans: isotopes

Ques: Q: About one-fourth of the blood pumped with each heartbeat enters arteries serving what organs of digestion? Read this paragraph and choose the correct option from the provided answers: Blood Supply The blood vessels serving the digestive system have two functions. They transport the protein and carbohydrate nutrients absorbed by mucosal cells after food is digested in the lumen. Lipids are absorbed via lacteals, tiny structures of the lymphatic system. The blood vessels' second function is to supply the organs of the alimentary canal with the nutrients and oxygen needed to drive their cellular processes. Specifically, the more anterior parts of the alimentary canal are supplied with blood by arteries branching off the aortic arch and thoracic aorta. Below this point, the alimentary canal is supplied with blood by arteries branching from the abdominal aorta. The celiac trunk services the liver, stomach, and duodenum, whereas the superior and inferior mesenteric arteries supply blood to the remaining small and large intestines. The veins that collect nutrient-rich blood from the small intestine (where most absorption occurs) empty into the hepatic portal system. This venous network takes the blood into the liver where the nutrients are either processed or stored for later use. Only then does the blood drained from the alimentary canal viscera circulate back to the heart. To appreciate just how demanding the digestive process is on the cardiovascular system, consider that while you are "resting and digesting," about one-fourth of the blood pumped with each heartbeat enters arteries serving the intestines. Choices: - stomach - bowels - lungs - intestines A:
Ans: intestines

Ques: Q: What term describes a drug that has an effect on the central nervous system? Read this paragraph and choose the correct option from the provided answers: Caffeine is an example of a psychoactive drug. It is found in coffee and many other products (see Table below ). Caffeine is a central nervous system stimulant . Like other stimulant drugs, it makes you feel more awake and alert. Other psychoactive drugs include alcohol, nicotine, and marijuana. Each has a different effect on the central nervous system. Alcohol, for example, is a depressant . It has the opposite effects of a stimulant like caffeine. Choices: - nonaddictive drug - elemental drug - steroidal drug - psychoactive drug A:
Ans:
psychoactive drug