Answer the following question given this paragraph: The frequency of sound waves is measured in hertz (Hz), or the number of waves that pass a fixed point in a second. Human beings can normally hear sounds with a frequency between about 20 Hz and 20,000 Hz. Sounds with frequencies below 20 hertz are called infrasound . Infrasound is too low-pitched for humans to hear. Sounds with frequencies above 20,000 hertz are called ultrasound . Ultrasound is too high-pitched for humans to hear. Q: The frequency of sound waves is measured in what unit? Choices: - watt - rads - decibel - hertz A:
hertz
(Question)
Answer the following question given this paragraph: Q: What is released when catabolic pathways break down complex molecules? Choices: - hydrogen - oxygen - food - energy A:
(Answer)
energy
Ques: Answer the following question given this paragraph: Q: Resemblance to other species can serve as protection to what category of species? Choices: - producer - predator - consumer - prey A:
Ans: prey
(Q).
Answer the following question given this paragraph: Several lethal viruses that cause viral hemorrhagic fever have been discovered, two of which are shown in the Figure below . Ebola outbreaks have been limited mainly to remote areas of the world. However, they have gained extensive media attention because of the high mortality rate23 percent to 90 percentdepending on the strain. The primary hosts of the viruses are thought to be apes in west central Africa, but the virus has also been isolated from bats in the same region. Q: What are the 2 primary hosts of ebola in central africa? Choices: - hyenas and apes - apes and hippos - lions and elephants - apes and bats A:
(A).
apes and bats
Ques:Answer the following question given this paragraph: Sedimentary rock layers that are not horizontal are deformed. Q: If a sedimentary rock layer is not horizontal, what is it? Choices: - striated - mineralized - igneous - deformed A:

Ans:deformed
Answer the following question given this paragraph: Mutations that occur in body cells cannot be passed on to offspring. They are confined to just one cell and its daughter cells. These mutations may have little effect on an organism. Q: Mutations cannot be passed on to offspring if they occur in what type of cells? Choices: - put cells - kept cells - blood cells - body cells A:
body cells