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3 years ago

Although dams serve many important purposes, they can also have a negative impact on the environment by

Biology

1 answer:

NeX [460]3 years ago

5 0

Negative impact on the environment by dams:

We all know that dams are important where there is heavy flow of water. Dams also have negative impact which are numerous and varied. They create impact on biological, chemical and physical properties. When dams are built across the river, fish migrations are affected. They also trap the sediments which affects the physical processes.

The temperature changes, composition of chemicals and the dissolved oxygen levels are not suitable for aquatic plants and animals. Due to the downstream of riverbed in dams it may affect more than 100 kilometers below a dam.

Thus, we can conclude that construction of dams can affect aquatic species, loss of forest, wetland and farmland and extinction of birds in the floodplains.

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What are the possible phenotypes of chicken offspring if one parent has black feathers ( FB ) and one parent has white feathers

Salsk061 [2.6K]

Answer:

None. Chickens have feathers not fur.

Now to color. The male usually determines color so without that information it is hard to answer with any authority.

In most crosses if the male is black and the hen is white you will get some black chicks and all will have white/black

variations.

If the male is white and the hen is black you will get some all

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If the breed is Leghorn, even if the rooster is black you will

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Explanation:

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3 years ago

Which structure forms as DNA unwinds? A. a special marker B. a complementary base C. a replication bubble D. a double helix

kozerog [31]

A replication bubble forms as the DNA unwinds.

Option C

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