Q: What harmful light does ozone reduce in the upper atmospheres? Read this paragraph and choose the correct option from the provided answers: The ozone in smog is also harmful to human health. The image below shows the levels of ozone to watch out for ( Figure below ). Some people are especially sensitive to ozone. They can be harmed by levels of ozone that would not affect most other people. These people include those with lung or heart problems. Choices: - infrared light - visible light - specific light - ultraviolet light A:
ultraviolet light

Q: Many protists form what kind of beneficial association with other species? Read this paragraph and choose the correct option from the provided answers: Choices: - Facultative - evolved - Opportunistic - symbiotic A:
symbiotic

Q: Q: Some mutations lead to new versions of proteins that help organisms adapt to changes in their environment and are essential for evolution to occur. what are these mutations known as? Read this paragraph and choose the correct option from the provided answers: Some mutations have a positive effect on the organism in which they occur. They are called beneficial mutations. They lead to new versions of proteins that help organisms adapt to changes in their environment. Beneficial mutations are essential for evolution to occur. They increase an organism's changes of surviving or reproducing, so they are likely to become more common over time. There are several well-known examples of beneficial mutations. Here are just two:. Choices: - superficial mutations - evolutionary mutations - provisional mutations - beneficial mutations A:
A: beneficial mutations

Question: Q: What type of tissue transports water and minerals in a vascular plant? Read this paragraph and choose the correct option from the provided answers: 25.4 Seedless Vascular Plants Vascular systems consist of xylem tissue, which transports water and minerals, and phloem tissue, which transports sugars and proteins. With the development of the vascular system, there appeared leaves to act as large photosynthetic organs, and roots to access water from the ground. Small uncomplicated leaves are microphylls. Large leaves with vein patterns are megaphylls. Modified leaves that bear sporangia are sporophylls. Some sporophylls are arranged in cone structures called strobili. Choices: - collagen - capillaries - chlorophyll - xylem A:
Answer: xylem

*Question*
Q: Explosive eruptions associated with what can be tens of thousands of times as powerful as an atomic bomb? Read this paragraph and choose the correct option from the provided answers: An explosive eruption produces huge clouds of volcanic ash. Chunks of the volcano fly high into the atmosphere. Explosive eruptions can be tens of thousands of times as powerful as an atomic bomb ( Figure below ). Hot magma beneath the surface mixes with water. This forms gases. The gas pressure grows until it must be released. The volcano erupts in an enormous explosion. Choices: - forest fires - hurricanes - earthquakes - volcanoes A:
**Answer**
volcanoes

(Question)
Q: Scientists did not actually see viruses until what was invented? Read this paragraph and choose the correct option from the provided answers: Scientists did not actually see viruses for the first time until the 1930s. That's when the electron microscope was invented. The virus shown in Figure below was the first one to be seen. Choices: - magnifying glass - electronic scale - telescope - electron microscope A:
(Answer)
electron microscope