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exis [7]
3 years ago
15

Two environmental changes are described below: Environmental change 1: Many small tree saplings are competing for sunlight on th

e forest floor. Environmental change 2: Many bluebirds have become ill with the infectious West Nile virus. Which statement is true about these environmental changes?
Biology
1 answer:
lilavasa [31]3 years ago
3 0

Answer:

Both statements are true

Explanation:

Many small tree saplings are competing for sunlight on the forest floor because tree saplings in forest floors are often deprived of adequate light as a result of the shade created by bigger trees in the forest. <em>Hence, the saplings jostle for light in order to effectively carry out light-requiring physiological activities such as photosynthesis and chlorophyll synthesis.</em>

The West Nile virus a virus that <em>generally affects the central nervous systems of birds - the primary host. It is transmitted from one bird to another through contact and by a vector - the mosquito</em>. The virus is also capable of being contracted by humans where it causes fatal neurological disorders.

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3 0
3 years ago
Almost all coal used today was produced during the Carboniferous period from dead animals in the swamps.
Ann [662]

Answer:

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Explanation:

Almost all coal that is used today has its origins in the Carboniferous period. The Carboniferous period was a warm and wet one, with the majority of the land being swampy and covered with dense rainforests of ancient tree species. By the end of this period, the climate quickly changed, resulting int he collapse of the rainforests. As the trees were dying out, they were falling in the swamps, quickly being covered by the mud, so remaining largely preserved. Over time they got exposed to higher pressure and temperatures as they were getting deeper into the crust, eventually resulting in the formation of the coal.

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zhannawk [14.2K]

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Explanation:

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