Why is it believed that life CANNOT evolve on a planet that orbits a spectral type A, B, or O star?   a. These stars produce too much infrared radiation, which would destroy carbon-based organisms.   b. These stars have very small life zones.   c. These stars are not capable of producing planets.   d. These stars do not remain on the main sequence long enough for life to evolve.   e. These stars take too long to form.

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A: Global atmospheric oxygen level is decreasing over the past 30 years. It is mainly due to the burnin...

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A: Comets are mostly dirty frozen balls of only a few kilometers in radius when away from Sun. As soon ...

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A: The solar system consists of a star around which planets revolve. Such a solar system is ours. It go...

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A: The gases present in atmosphere by maintaining a suitable condition are called greenhouse gases. The...

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A: The natural environment or the natural world includes all living and non-living things that occur na...

Q: My question is in the picture.

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Q: does the equator receive direct 90° insolation each day throughout the year explain? 

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A: The largest atmosphere of a certain planet in our solar system is Jupiter's atmosphere. It is primar...

Q: write a report on the ice age periods.

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Q: What system of planting has the optimum number of permanent plants per unit area?

A: The farming system, which is the system that is based on the method of cultivating the land accordin...

Q: What is the easiest way to distinguish carbonate rocks from siliciclastic rocks?     Using Hyd...

A: Rocks are naturally occurring aggregates of minerals. The Earth's surface is made up of different ty...

Q: The extreme size of volcanoes on Mars indicates that   a. Mars has a much thicker crust than Ear...

A: Mars has a similar size to earth and it also contributes several surficial features depicting that t...