Answer the following question given this paragraph: Amphibians were the first animals to have true lungs and limbs for life on land. However, they still had to return to water to reproduce. That's because their eggs lacked a waterproof covering and would dry out on land. The first fully terrestrial vertebrates were amniotes. Amniotes are animals that produce eggs with internal membranes. The membranes let gases but not water pass through. Therefore, in an amniotic egg, an embryo can breathe without drying out. Amniotic eggs were the first eggs that could be laid on land. Q: What were the first animals to have true lungs and limbs for life on land? Choices: - birds - mammals - reptiles - amphibians A:
amphibians
Answer the following question given this paragraph: The genetic code is universal. All known living organisms use the same genetic code. This shows that all organisms share a common evolutionary history. Q: What common code do all known living organisms use? Choices: - biochemical - Morse code - code of ethics - genetic A:
genetic
Q: Answer the following question given this paragraph: Q: What serves to replace nonreproducing specialized cells as needed in the adult body? Choices: - osteoclast cells - monocyte cells - dendritic cells - stem cells A:
A: stem cells
Question: Answer the following question given this paragraph: Figure 10.18 The first image shows how helicopters store large amounts of rotational kinetic energy in their blades. This energy must be put into the blades before takeoff and maintained until the end of the flight. The engines do not have enough power to simultaneously provide lift and put significant rotational energy into the blades. The second image shows a helicopter from the Auckland Westpac Rescue Helicopter Service. Over 50,000 lives have been saved since its operations beginning in 1973. Here, a water rescue operation is shown. (credit: 111 Emergency, Flickr). Q: Helicopters store large amounts of rotational energy of what type in their blades? Choices: - magnetic - seismic - thermal - kinetic A:
Answer: kinetic
*Question*
Answer the following question given this paragraph: Measurement of exposure to radioactivity is important for anyone who deals with radioactive materials on a regular basis. Perhaps the simplest device is a personal dosimeter a film badge that will fog up when exposed to radiation. The amount of fogging is proportional to the amount of radiation present. These devices are not very sensitive to low levels of radiation. More sensitive systems use crystals that respond in some way to radioactivity by registering the number of emissions in a given time. These systems tend to be more sensitive and more reliable than film badges. Q: What is used by sensitive systems to detect even low levels of radiation? Choices: - electrons - radars - ions - crystals A:
**Answer**
crystals
*Question*
Answer the following question given this paragraph: Alpha particles can travel only a few centimeters through air. They can burn the skin but not penetrate it. Beta particles can travel up to a meter through air. They can penetrate and damage skin. Gamma rays can travel thousands of meters through air. They can penetrate and damage cells deep inside the body. Q: What kind of rays can travel thousands of meters through air and can penetrate and damage cells deep inside the body? Choices: - x-rays - cosmic rays - plasma rays - gamma rays A:
**Answer**
gamma rays