If each level in a food chain typically loses 90 percent of the energy it takes in, and the producer level uses 1000 kcal of energy ,how much of that energy is left after the third trophic level

Answers

Answer 1

Answer:

The energy that is left after the third trophic level is 10 kcal.

How much of that energy is left after the third trophic level?

The first trophic level uses 1000 kcal.
The second trophic level used 100 kcal.
So, the third trophic level uses 10 kcal leaving 1 kcal.
The energy is transferred from trophic level to trophic level, and approximately 90% of it is lost each time.
With some of it being lost as heat into the environment (as a result of respiration) and some being lost as partially digested food.

Hence, if each level in a food chain typically loses 90 percent of the energy it takes in, and the producer level uses 1000 kcal of energy, the energy that is left after the third trophic level is 10 kcal.

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Answer 2

Answer: There is 10 kcal energy left in the 3rd trophic level.

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Which of the following best explains how human activities can directly contribute to landslides?

Answers

There are no available choices but the biggest human activity which causes landslides is because of deforestation. Excessive logging and tree cutting causes major effects on the ecological balance of forests. There are no available roots within the soil that hold it together, as a result landslides that are destructive occurs.

Each degree on the Kelvin scale equals how many degrees on the Celsius scale?-1
-10
-no relationship (different scale)
-2.12

Answers

Answer: The correct answer is 1

Explanation-

The lower fixed point and upper fixed point of the kelvin scale is 273 K and 373 K respectively. It is divided into 100 equal parts, each part is called 1 Kelvin.

Whereas, the lower fixed point and upper fixed point of the celsius scale is 0 degree and 100 degree respectively. It is also divided into 100 equal parts, each part is called 1 degree.

Hence, the change in 1 degree on celsius scale is equal to 1 degree on the kelvin scale.

A 1 degree change in Kelvin means 1 degree change in Celsius. So the first answer is the correct one. The difference is that the Kelvin scale starts at the absolute zero temperature, therefore it can't have negative values.

In asexual reproduction, ________.a. the offspring are genetically unique
b. the offspring are made up of portions of each of the parent's dna
c. the offspring are genetically related but also genetically distinct
d. the offspring have identical dna

Answers

In asexual reproduction, d. the offspring have identical DNA.

Asexual reproduction involves the process of mitosis for cell division. In the process of mitosis, the DNA duplicates and separates into two different cells. The duplicated DNA is genetically identical to the DNA of the mother or parent cell. This type of reproduction is faster than the reproductive method.

Final answer:

Asexual reproduction involves one parent and results in offspring that are essentially clones of the parent, meaning they have identical DNA. It involves methods like binary fission, budding, and vegetative reproduction.

Explanation:

In asexual reproduction, the most fitting answer from your listed options would be: that the offspring have identical DNA. This type of reproduction involves one parent and the offspring produced are, for all intents and purposes, clones of the parent because they have identical genetic information. Asexual reproduction methods can include processes such as binary fission, budding, and vegetative reproduction.

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This part of the cell stores wastes, water or food.a. lysosome Eliminate
b. mitochondria
c. ribosome
d. vacuole

Answers

This part of the cell stores wastes, water or food is vacuole. TThus, option D is correct.

The vacuole is an organelle found in both plant and animal cells that stores various substances, including wastes, water, and food. It plays a crucial role in regulating the cell's internal environment and maintaining cell turgor pressure in plant cells.

Lysosomes are responsible for the digestion and elimination of cellular waste materials, mitochondria are the powerhouse of the cell involved in energy production, and ribosomes are involved in protein synthesis.

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Answer:

Explanation:

If an atom like aluminum becomes an ion by losing 3 electrons, what is thecharge on the ion?
1+
2+
3+
3-

Answers

The basis to this Qs. is that electrons are negatively charged, and protons are positively charged. Essentially, the reason for an atom’s neutrality is a balance between the proton(s)/ positive charge(s) and the electron(s)/negative charge(s). So when 3 electrons are lost, we have an extra 3 protons left. As the charge of the proton is positive, your answer is “3+”.

Which aquatic biome forms where freshwater streams or rivers merge with the ocean? form where freshwater streams or rivers merge with the ocean.

Answers

Estuaries, aquatic biome, forms where freshwater streams or rivers merge with the ocean.

What is estuaries?

Estuaries are a transitionalzone between river environments and ocean environments.

They are impacted by both riverine and marine factors, including flows of freshwater and sediment as well as marine factors like tides, waves, and the inflow of salt water.

In addition to lagoons, river mouths, and tidal creeks, this wide definition encompasses them.

An estuary is a dynamic ecosystem that connects to the open sea and allows seawater to enter in accordance with the tide cycle. The fresh water flowing from rivers and streams dilutes the seawater that enters the estuary.

Therefore, where freshwater rivers meet saltwater seas is where estuary biomes typically occur.

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Answer:Estuaries

Explanation:

Estuaries are areas where freshwater streams or rivers merge with the ocean. This mixing of waters with such different salt concentrations creates a very interesting and unique ecosystem

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Biologists believe that a large number of species that are part of the rain forest ecosystem are on the verge of extinction. Which statement BEST describes the role of urbanization in this disaster?A) Urbanization leads to deforestation and loss of habitat for many species.B) Many animals are captured or killed by poachers, significantly reducing their numbers.C) Viral epidemics that break out in human populations spread to animals in the ecosystem.D) Factories cause a significant rise in temperature in the forests, endangering many species.

The growth of most plants is limited by the amount of nitrogen available. Which of the following effects does low nitrogen availability most likely have on the carbon cycle?A More carbon dioxide is taken up by plants B Carbon dioxide is trapped in the soil around plants C Less carbon dioxide is removed from the atmosphere. D Carbon dioxide is converted to carbonates by bacteria.

I am one of the most dynamic processes of Earth. I help recycle Earth's materials. I move Earth's crustal plates, creating many different geological surface features. I am also the cause of natural disasters, such as earthquakes and volcanoes. What am I?

Enzymes are: A. fats. B. sugars. C. starches. D. proteins