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IRINA_888 [86]
3 years ago
8

Stone fly nymphs live in beds of streams that contain a high level of dissolved oxygen (DO). When the dissolved oxygen decreases

in the stream, stone fly nymphs can no longer live there. Stone fly nymphs are an example of
Biology
1 answer:
Ira Lisetskai [31]3 years ago
4 0

Answer:

Indicator species

Explanation:

Indicator species refers to the species whose presence or absence in particular ecosystem indicates about the condition of the ecosystem.

In the given question, the stonefly which cannot survive if the dissolved oxygen in the water gets reduced as a result of the pollution indicates that the ecosystem or habitat has some pollutants which have decreased the level of DO in the aquatic habitat.

Thus, the indicator species is the correct answer.

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5 0
3 years ago
How high is the ceiling in a school gym if a volleyball thrown upward from the floor at 15 m/s barely touches the ceiling before
Harman [31]

The height of the ceiling in the school gym from the floor is 11.48m.

HOW TO CALCULATE HEIGHT OF A PROJECTILE:

  • Using one of the equations of motion as follows:

v² = u² + 2as

Where;

v = final velocity (m/s)

u = initial velocity (m/s)

a = gravitational acceleration (m/s²)

s = distance traveled (m)

According to this question,

  • The final velocity (v) of the volleyball is 15m/s
  • The initial velocity is 0m/s
  • The acceleration due to gravity is 9.8m/s

Using the formula, v² = u² + 2as, the height of the ceiling (s) can be calculated as follows:

15² = 0² + 2 (9.8) (s)

225 = 0 + 19.6s

225 = 19.6s

s = 225/19.6

s = 11.48m

Therefore, the height of the ceiling in the school gym from the floor is 11.48m

Learn more: brainly.com/question/21065813

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Answer:

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4 years ago
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