BIOLOGY HIGH SCHOOL

Which statement illustrates how human activities can most directly change the dynamic equilibrium of an ecosystem?Water pollution causes a decrease in fish populations in a river.
A hurricane causes a stream to overflow its banks.
Increased wind increases water evaporation from a plant.

Answers

Answer 1
Answer: The best answer would be the first statement. The first sentence which is 'water pollution causes a decrease in fish populations in a river.' illustrates how human activities can most directly change the dynamic equilibrium of an ecosystem.
Answer 2
Answer:

Answer: Water pollution causes a decrease in fish populations in a river.

Explanation:

An ecosystem is a biotic community which includes abiotic (non-living) and biotic (living) components. The abiotic components includes water, sunlight, wind, soil and temperature whereas the biotic components includes the living beings such as plants, animals, microbes and other. The dynamic equilibrium of the ecosystem can be defined as the condition in which the abiotic factors of the ecosystem supports the life of the biotic factors without undergoing any drastic change which could negatively affect the population of living beings.

The river water is an abiotic factor which can be a habitat of large diversity of marine flora and fauna. The pollution of water could negative affect the population of the fish residing in the river. This will disturb the balance of ecosystem. As, in the ecosystem various species interact with one another to survive. Hence, the dynamic equilibrium will be changed.

Related Questions

Which of these could NOT be a measurement of speed? A. 10 m/s B. 35 mi/s C. 5 km/h north D. 1,000,000 mm/h
Steroids, cholesterol, and wax are all examples of?
What is the production of new plants without seeds?
look at the image which statement explains what would most likely happen if the moon were closer to earth ?
Agriculturists have developed some varieties of vegetables from common wild mustard plants, which reproduce sexually. Which statement best explains the development of these different varieties of vegetables? a. Different species can develop from a single species as a result of the effect of similar environmental conditions. b. Different varieties can develop from a single species as a result of the recombination of genetic information. c. Variations in a species will increase when the tate of mitosis is decreased. d. Mutations will occur in the genes of a species only if the environment changes.

A student observed a specimen through a light microscope.He used the objective lens marked * 40
.if he indiceated the
magnification of the image as
* 400
what was the eyepiece magnifacation?​

Answers

Ans

400=x*40

x=400/40=10

ans =   x10

Explanation:

total magnification=eyepiece magnification*objective lens magnification

eye piece=total/objective lens

:)

Sometimes new information results in minor changes to a theory. But sometimes new information results in a theory being discarded as incorrect. An example of an incorrect theory that was disproved by the discovery of new information isPtolemy’s theory of the solar system.
the original cell theory.
the germ theory.
plate tectonic theory.

Answers

An example of an incorrect theory that was disproved by the discovery of new information is Ptolemy’s theory of the solar system. The correct option among all the options that are given in the question is the first option. Ptolemy’s theory stated that the earth is the center of the universe. I hope it helped you.

The Ptolemy's theory of the solar system was disproved by the discovery of the new information. The Ptolemy's theory stated that the Earth is at the center of the solar system and all the planets, suns and stars orbited around it while the Earth stayed completely stationary. However, this theory was proven to be false as the sun-centeric model of the solar system better explained various phenomenon, such as the particular movement of the planets.

Hence, the correct answer is 'Ptolemy's theory of the solar system'.

The mass of an atom is contained primarily in its _____. A. Electron Shell B. Nucleus C. Proton D. Size

Answers

The mass of the atom is contained mainly in the nucleus itself. The nucleus is composed of a number of protons and neutrons which are positively charged and neutrally charged sub particle components. The nucleus are surrounded by electrons.
The mass of an atom is contained primarily in its NUCLEUS.
An atom is made up of three sub particles, which are proton, neutrons and electrons. The proton and the neutrons are located in the nucleus of the atom while the electron  are located outside the nucleus where they move about in continuous motion around the nucleus. The proton and the neutrons, which are located in the nucleus have the same relative mass of 1, which has been estimated to be about 2,000 times bigger than that of the electron, which has a relative mass of 0.0005. This shows that, the mass of an atom is located primarily in its nucleus. 

Special adaptations of parasitism

Answers

1) Body shape and Size
2) Simple Structures
3) Hooks and Mouths to suck easier.
The the body size and shape of the parasite depends upon the space  available at the site of infection.

What is the RNA sequence that will be formed from the DNA sequence: GGCTATTC?a. GGCUAUUC
b. CCGAUAAG
c. CCGUAUUG
d. CCGTUTTG

Answers


The correct answer is B.

According to base pairing rules, A will always pair with T and and G will always pair with C.  This pairing happens in DNA.

When it comes to RNA, there is a slight difference. Thymine is never found in RNA but is replaced with Uracil. So instead of Adenine pairing with Thymine, it will be Uracil which takes the place of Thymine.

It is important  to note that  Thymine in DNA will  code for Adenine in RNA because Adenine is found in RNA  base sequence.  However whenever Adenine in DNA wants to code for a complementary base  to copy on RNA, then Adenine will call for Uracil, not Thymine.


Plants seemed to evolve in which order?

Answers

The correct answer is bryophytes, gymnosperms,angiosperms. Bryophytes are simple mosses while gymnosperms are plants that, unlike bryophytes, have vascular tissue. They do not however have any seeds, unlike the angiosperms which have both vascular tissue and seeds, making them the most evolved of the three.
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Bees can see colors we cannot see, and they can detect minute amounts of chemicals we cannot sense. Unlike many insects, bees cannot hear very well. A biologist would probably give which of the following as the ultimate explanation for their poor hearing?a.) If a bee could hear, its highly programmed brain would be overwhelmed with information.b.) If bees could hear, the noise of the hive would be overstimulating.c.) This is an example of altruism.d.) Bees are too small to have functional ears.e.) Hearing may not contribute much to a bee's reproductive success.