Answer the following question given this paragraph: Alkanes contain only carbon-carbon single bonds. Q: What type of bonds do alkanes only contain? Choices: - hydrogen bonds - carbon-hydrogen bonds - hydrogen-carbon bonds - carbon-carbon single bonds A:
carbon-carbon single bonds
Answer the following question given this paragraph: The sodium-potassium pump is an active transport pump that exchanges sodium ions for potassium ions. Q: The sodium-potassium pump is an active transport pump that exchanges sodium ions for what? Choices: - nitrogen ions - oxygen ions - chlorine ions - potassium ions A:
potassium ions
Q: Answer the following question given this paragraph: The orbits of the planets lie in nearly the same plane. The Sun is at the center. Q: The planets orbit around what celestial body? Choices: - moon - earth - horizon - sun A:
A: sun
Question: Answer the following question given this paragraph: Human beings are mammals. Like other mammals, we have hair and mammary glands. The subclass in which the human species is classified is the placental mammals. Q: What type of mammals are humans? Choices: - somatic mammals - marsupial mammals - respiratory mammals - placental mammals A:
Answer: placental mammals
*Question*
Answer the following question given this paragraph: The chemicals that trigger an inflammatory response attract leukocytes to the site of injury or infection. Leukocytes are white blood cells. Their role is to fight infections and get rid of debris. Leukocytes may respond with either a nonspecific or a specific defense. Q: What color are leukocytes blood cells? Choices: - blue - black - red - white A:
**Answer**
white
*Question*
Answer the following question given this paragraph: Most amphibians breathe with gills as larvae and with lungs as adults. Additional oxygen is absorbed through the skin in most species. The skin is kept moist by mucus, which is secreted by mucous glands. In some species, mucous glands also produce toxins, which help protect the amphibians from predators. The golden frog shown in Figure below is an example of a toxic amphibian. Q: What do most amphibians breathe with as larvae? Choices: - pores - lungs - nasal passages - gills A:
**Answer**
gills