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What is a dangerous level of dissolved oxygen?
A dangerous level of dissolved oxygen in water is below 4-5 mg/L for most aquatic species. Low levels can stress or kill aquatic organisms, disrupt the ecosystem balance, and indicate poor water quality.
If the water level of a river drops how might that affect a fish population living in that river?
A drop in water level effectively destroys habitat for fish and other aquatic life. For example, those species of fish and other organisms that live in shallow water environments either die, or move to deeper water where they can no longer thrive.
Why does the increased level of nutrients in the water affect the aquatic animals?
Increased level of nutrients result in growth of algae in the water.These algae use up all the oxygen in water and form a layer on the water not allowing oxygen to enter.Therefore the aquatic animals die because they don't get oxygen.
What is the answer for which of the is an example of macroevolution?
An example of macroevolution is the evolution of whales from land-dwelling mammals to fully aquatic creatures over millions of years. This involves significant genetic and morphological changes at the species level, resulting in new species with distinct characteristics.
How can changes in environmental conditions affect the survival of a species?
If a species lives in only one particular salt marsh biome and the sea level rises to inundate that biome. all members of the species will die out.
How changes in environmental conditions can affect the survival a species?
If a species lives in only one particular salt marsh biome and the sea level rises to inundate that biome. all members of the species will die out.
Are the terms narrow host range and broad host range used to describe effects at the bacterial family genus species or strain level?
This means that a bacteria may affect one or a few species such as humans and other primates making this a narrow host range. Or the bacteria could affect all mammals and affect a broad host range. Using family, genus, species or strain could cover both narrow or broad host range. Most of the time, it is at the species level.
What level of taxonomy is the most specific?
The most specific level of taxonomy is species.
What classification level is the most specific?
species
What is the pH level of a river?
Natural waters usually have a pH between 6 and 9. CO2, minerals & soils, decaying vegetation, and nitric acid(HNO3) & sulfuric acid (H2SO4) caused by air pollution from car exhaust and power plants (also known as acid rain) can all affect the pH of the our water.
How can pollution affect the level of oxygen in water?
The concentration of oxygen in waters decreases.
What is finest level of classification for animals?
The finest level of classification for animals is species.
