Answer the following question given this paragraph: The kidneys also need constant pressure to filter the blood. When the blood pressure drops too low, the kidneys increase the pressure. One way is by producing angiotensin, a blood vessel-constricting protein. This protein also signals the body to retain sodium and water. Together, the constriction of blood vessels and retention of sodium and water help restore normal blood pressure. Q: What organs need constant pressure to filter the blood? Choices: - lungs - dialysis - arteries - kidneys A:
kidneys
(Question)
Answer the following question given this paragraph: All amphibians have digestive, excretory, and reproductive systems. All three of these organ systems use a single body cavity, called the cloaca. Wastes enter the cloaca from the digestive and excretory systems. Gametes enter the cloaca from the reproductive system. A single external opening in the cloaca allows the wastes and gametes to exit the body. (Many other four legged vertebrates also have a cloaca. ). Q: An external opening in the what of amphibians allows wastes and gametes to exit the body? Choices: - anus - oral cavity - urethra - cloaca A:
(Answer)
cloaca
Ques: Answer the following question given this paragraph: Nuclear energy is released when the nucleus of an atom is split. Q: What kind of energy is released when the nucleus of an atom is split? Choices: - microwave - kinetic - atomic - nuclear A:
Ans: nuclear
(Q).
Answer the following question given this paragraph: Changes in the genes of a species may result in a new species. This is biological evolution. Q: When changes in the genes of a species result in a new species, the process is called what? Choices: - Classic Evolution - simple evolution - similar evolution - biological evolution A:
(A).
biological evolution
Ques:Answer the following question given this paragraph: Materials that have high resistance to electric current are called electric insulators . Examples include most nonmetallic solids, such as wood, rubber, and plastic. Their atoms hold onto their electrons tightly, so electric current cannot flow freely through them. Dry air is also an electric insulator. You can learn more about electric insulatorsas well as how to test whether a material is an insulatorby doing the activity at this URL:. Q: What do you call materials that have high resistance to electric current? Choices: - conductors - semiconductors - destructive insulators - electric insulators A:

Ans:electric insulators
Answer the following question given this paragraph: Image copyright SergiyN, 2014. Coil of copper wire, which conducts electricity well due to metallic bonds . Used under license from Shutterstock. com. Q: What gives a coil of copper wire the ability to conduct electricity well? Choices: - optical bonds - metallic electrons - metallic ions - metallic bonds A:
metallic bonds