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Fed [463]
3 years ago
11

Define "water pollution".

Biology
2 answers:
Elina [12.6K]3 years ago
8 0

Answer: It is the indiscriminate dumping of nonuseful substances into water bodies

Explanation:

Water pollution occurs when non-useful substances like chemical, industrial, human wastes etc, are dumped into water bodies (oceans, rivers, lakes) as a means of disposing such wastes

For instance: water pollution occurs when unused battery is drop in the lake, sewage is dumped in the river etc

Mama L [17]3 years ago
6 0

Answer:

The introduction of a foreign substance, usually harmful, into a water source

Explanation:

Anything that doesn't naturally belong in the water

Examples: plastics, scrap metal, fertilizers

leaves, sticks, and cadavers are more of a grey area. They are part of nature but if it clogs the water source, drastically changes the ecosystem or are dumped there, then they are considered pollution.

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C. Bacteria

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2 years ago
Peter and Rosemary Grant observed a small group of the large ground finches that colonized Daphne Major in the Galápagos Islands
erica [24]

Answer:

1) Founder effect and genetic drift: Small colonizing population did not represent the original gene pool of the source population and was more likely to undergo genetic drift.

2) Natural selection

Explanation:

Evolution of the population of the finches with larger beaks might have occurred due to one of the following mechanisms:

a) Founder effect and genetic drift: Since the size of the colonizing population was small, it did not carry all the genes and their alleles present in the gene pool of the original population. The small population size made it more likely to evolve by any chance event.  

b) Natural selection: The availability of different food types in the new habitat led to the natural selection of the larger beaks as the finches with larger beaks might have been able to better exploit the available food resources.  

8 0
3 years ago
Does evolution say blacks are subhumans? 3/4th human?
xenn [34]
No blacks are 100% human.. people are black because of the pigments in your skin. That is why we have light skins and dark skins not because light skins are more human than dark skins.
4 0
3 years ago
Cells that secrete protein fibers in bone are called
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Answer:

Osteoblasts

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Cells that secrete protein fibres in bones are called osteoblasts.

I hope this helps.

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