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kobusy [5.1K]
3 years ago
6

A population decreases after many members emigrated when a nearby river becomes polluted. How would you explain the reason for t

his decrease?
Biology
2 answers:
pochemuha3 years ago
8 0
More people cone in and pollute things do animals will leave because it’s bad for them
Olenka [21]3 years ago
3 0
Emigrated means they exited so due to the high amounts of pollution all the animals left which cause a population decrease
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Ques.what will happen if the stretch receptors of the urinary bladder wall are totally removed?
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What does it mean when it says that aerobic respiration occurs in the cytoplasm “TO” the mitochondria???
Romashka-Z-Leto [24]

Answer:

Kerb cycle

<u>Explanation</u>:

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4 0
3 years ago
Is oxygen a compound or an atom?
alexgriva [62]
1. an atom
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5 0
2 years ago
During what stage does land get ready for the arrival of a new species
34kurt

Answer

           The correct option is B.

Explanation

          Ecological succession of any species is composed of following stages:

A. Migration

            The movement of species from one place to another location for the purpose of setting permanently o temporary is known as migration . Forexample

             Siberian crane (<em>Leucogeranus leucogeranus</em>) that live in the arctic tundra of eastern and western Russia. The eastern population of birds migrate to china while western population of these birds migrate to Iran, India and Nepal during winter season.

B. Ecesis

         The complete establishment of species in new habitat that was completely barren or left barren due to some catastrophe is known as Ecesion. This process is dependent upon the climatic, edaphic and biotic factors. The success of plant depend upon some of the adaptations to withstand the unfavorable conditions which includes both biotic and abiotic conditions.

Forexample

               The process of succession in xerosphere start on barren area from pioneer stage covered by crustose lichen, then foliose lichen followed by moss stage, herbaceous stage and a last by shrub stage.

C. Nudation

       The initiation of new species by major environmental disturbance such as volcano eruption is known as Nudation.

D. Reaction

            It represents the effect of established species on the habitat. Forexample plants alter habitat condition as they grow. They extract raw materials from the environment in large amounts and return metabolic wastes. The waste accumulates in large amounts and differ from the original raw materials, thus altering the environment.  

E. Competition

             The phenomenon which involves struggle for existence between two or more individuals growing in same area, that make excessive demand that are similar in nature on the soil is known as competition.

Such struggle may be in between same species or different species. The competition may be interspecific or intraspecific. Because of completion the weak individuals are eliminated as strong ones are retained.

 


8 0
2 years ago
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