Answer the following question given this paragraph: 42.1 Circulatory systems link exchange surfaces with cells throughout the body. Q: What organ systems link exchange surfaces with cells throughout the body? Choices: - vascular - pulmonary - nervous - circulatory A:
circulatory
Answer the following question given this paragraph: Some parasites live on the surface of their host. Others live inside their host. They may enter the host through a break in the skin or in food or water. For example, roundworms are parasites of mammals, including humans, cats, and dogs (see Figure below ). The worms produce huge numbers of eggs, which are passed in the host's feces to the environment. Other individuals may be infected by swallowing the eggs in contaminated food or water. Q: In what do a roundworm's eggs pass from host to the environment? Choices: - skin - arms - mouth - feces A:
feces
Q: Answer the following question given this paragraph: Q: What type of disturbance do even dominant plants depend on in many biomes? Choices: - mass extinction - radiation - seismic force - periodic A:
A: periodic
Question: Answer the following question given this paragraph: Flickr:futureatlas. com (http://futureatlas. com/blog/). Human activities like burning gasoline in cars are contributing to a global change in our climate . CC BY 2.0. Q: Burning gas to run our cars is an example of how human activity is contributing to what global event? Choices: - ozone change - carbon change - metamorphic change - climate change A:
Answer: climate change
*Question*
Answer the following question given this paragraph: The geologic time scale is divided into eons, eras, periods, and epochs. Q: The geologic time scale is divided into eons, eras, periods, and? Choices: - cultures - tropics - zones - epochs A:
**Answer**
epochs
Answer the following question given this paragraph: Mineral crystals that form when magma cools are usually larger than crystals that form when lava cools. Q: Mineral crystals that form when magma cools are usually _______ than crystals that form when lava cools. Choices: - older - denser - smaller - larger A:
larger