Why is diversity of life an important indicator of water quality?

QUESTION POSTED AT 26/03/2020 - 03:25 PM

Answered by admin AT 26/03/2020 - 03:25 PM

Dissolved oxygen levels. The solubility of oxygen decreases as water temperature increases.Chemical processes. Temperature affects the solubility and reaction rates of chemicals. In general, the rate of chemical reactions increases with increasing water temperature.Biological processes. Temperature affects metabolism, growth, and reproduction.


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Consider this northern site of primary succession following the retreat of a glacier. As we move from left to right, describe some improvements in the abiotic factors that support plant growth. A) change in climate over time B) less competition for water resources due to biodiversity C) improved soil quality: increased humus and water retention D) increased population density resulting in decreased pathogens

Answer: C. improved soil quality: increased humus and water retention.

Explanation:

An ecological succession brings change in the type of living species residing in an ecosystem with respect to changes that occur in the abiotic (non-living factors) with respect to time.

A region affected by a retreating glacier will not be suitable for the growth of living species. The soil may be lacking minerals and will be in the permafrost condition. So for the initiation of succession the improvement in soil an important abiotic factor is required. The improved soil quality will allow the accumulation of organic and inorganic minerals by physical and biological processes. This will help in formation of humus and water retention.

ANSWERED AT 28/03/2020 - 12:55 PM


QUESTION POSTED AT 28/03/2020 - 12:55 PM

What might happen if your body couldn't process glucose? A. You wouldn't be able to digest food B. You wouldn't have the energy you needed to function C. You would be more likely to catch diseases Or D. You would be constantly thirsty for water

B. you wouldn't have the energy to function
because glucose is a simple sugar that is an important energy source in living organisms

ANSWERED AT 28/03/2020 - 12:40 PM


QUESTION POSTED AT 28/03/2020 - 12:40 PM

Why are the Galapagos Islands important in our understanding of how species adapt to their enviornment? Discuss it's geographic location, what Darwin concluded, and the researcj of the Grants

Charles concluded that the finches beaks are examples of adaptive radiation. To fit in the island, they had to adapt to the conditions. This lead to Charles’ theory of natural selection. Charles came to the conclusion of evolution and natural selection. Natural selection is the process where organisms adapt to their environment to survive and produce more offspring. Evolution is where different kinds of living organisms are thought to have developed. These theories have changed science forever and leave today’s scientists marveling of his theories. 

The Galapagos Islands are located in Ecuador and sit on the Pacific Ocean.
The Galapagos Islands were formed from 3 million to 5 million years ago. Volcanic eruptions typically shield volcanoes formed the islands. They are located over a “particularly hot mantel” that causes volcanic activity. The outcome of many eruptions were islands because the left overs were pushed to the surface. The Galapagos islands are pretty big reaching an area of 3,093 miles. The temperatures range from 69 to 84 degrees creating a typically warm climate. 

All plants and animals are native to the islands. It is likely that sea animals swam there, birds flew there (with the help of wind), and reptiles and small animals were carried on rafts of vegetation. Since all the plants and animals are native to the islands, they had to adapt to the new food source and climate. Beaks, size, etc. are all changes made to these organisms to be able to live on the islands. 

The Grant’s research on the Galapagos Islands showed that evolution exists and can happen over a course of two years. They proved Darwin’s theories are true.  They observed the evolution of the finches and are said to have seen it with their own eyes. They spent years measuring beaks of the finches and documented change overtime.

Darwin’s research showed that finches beaks are different to fit their food source. It also started the theories of evolution and natural selection.  

ANSWERED AT 28/03/2020 - 12:38 PM


QUESTION POSTED AT 28/03/2020 - 12:38 PM

What are 2 factors that would limit population growth in marine life

The answer is Food and Nutrients

ANSWERED AT 28/03/2020 - 11:59 AM


QUESTION POSTED AT 28/03/2020 - 11:59 AM

What are two ways water travels from land to enter the ocean

•rivers
•runoff
• delta

ANSWERED AT 28/03/2020 - 11:47 AM


QUESTION POSTED AT 28/03/2020 - 11:47 AM

Water changes from a liquid to a gas in the process of evaporation t or f? PLEASE HURRY!!!

I believe that's true

ANSWERED AT 28/03/2020 - 11:34 AM


QUESTION POSTED AT 28/03/2020 - 11:34 AM

Why do angiosperms not need water for fertilization

Answer:

The answer is c) a pollen tube grows from the pollen grain into the ovary.

Explanation:

I got it correct on the quiz

ANSWERED AT 28/03/2020 - 11:26 AM


QUESTION POSTED AT 28/03/2020 - 11:26 AM

Which law provides for the cleanup of toxic waste site in the united states A.soil and water conservation act B.cercla C. resource management act D.clean air act

Which law provides for the cleanup of toxic waste site in the united states A. soil and water conservation act.

ANSWERED AT 28/03/2020 - 11:25 AM


QUESTION POSTED AT 28/03/2020 - 11:25 AM

Several species of fish and marine life eat plankton. How is that diversity important to the ecosystem as a whole?

Plankton is at the bottom of a food chain. Think of a pond. Mosquito larvae are in a pond. They eat the plankton. Small fish eat the larvae. Larger fish eat those smaller fish and the chain keeps going..BUTTT it all started with the PLANKTON. Without the plankton the whole food chain would be messed up and everything would start dying.. No plankton, no larvae, no small fish..and so on..

ANSWERED AT 28/03/2020 - 11:21 AM


QUESTION POSTED AT 28/03/2020 - 11:21 AM

Match each step in the conversion of biomass into electricity with the appropriate number. For example, Step 1 represents the first step. 1. Step 1 steam turns a turbine 2. Step 2 water boils into steam 3. Step 3 turbine powers a generator 4. Step 4 biomass is burned 5. Step 5 generator produces electricity

Answer:

The transformation of biomass into electricity can take place via many methods. However, the most common one is the direct combustion of biomass substance like woody substances or agricultural waste. The other method, which helps in converting biomass to electricity is gasification of biomass. Let us consider the steps of biomass combustion:  

Step 1: The burning of biomass.  

Step 2: The generation of steam takes place due to the boiling of water.  

Step 3: The generated steam turns a turbine.  

Step 4: The generator is powered with the help of a turbine.  

Step 5: Electricity gets generated with the help of a generator.  

ANSWERED AT 28/03/2020 - 11:12 AM


QUESTION POSTED AT 28/03/2020 - 11:12 AM

PLZ HELP what are scientists going to explore next on Kepler-186f? possible alien life it's atmosphere it's origin it's size

the atmosphere is correct i just took the test:)

ANSWERED AT 28/03/2020 - 11:03 AM


QUESTION POSTED AT 28/03/2020 - 11:03 AM

There are several species of salamanders that have adapted for life underground caves, where there is no light. These salamanders usually havw small non-functional eyes. There eyes can be example of

Adaptation because the Q states that they had to ADAPT correct so the correct response would be adaptation hope this helped <3333333333333

ANSWERED AT 28/03/2020 - 10:59 AM


QUESTION POSTED AT 28/03/2020 - 10:59 AM

Which factor do oceanographers measure in order to determine the salinity of ocean water

The salinity of ocean water can be determined by measuring the conductivity of the water. The characteristics of water such as salinity, depth, temperature, density can be defined by the instrument called Conductivity Temperature Depth instrument. This instrument is placed in water which is to be measured. As this instrument is lowered into the water it continuously records the conductivity, temperature and depth of the water. The electric current is flowed through the water and as we know salt water is a good conductor of electricity it will pass the current fast. Using this technique oceanographers determine the salinity of water.


ANSWERED AT 28/03/2020 - 10:54 AM


QUESTION POSTED AT 28/03/2020 - 10:54 AM

The central vacuole in a plant cell is responsible for turgor pressure. When the vacuole loses water the cytoplasm "shrinks". When the vacuole gains water the cytoplasm seems to "puff up". One structure helps the plant cell keep its shape no matter how much water is in the vacuole. This is the A) cell wall. B) cytoplasm. C) cytoskeleton. D) cell membrane.

Answer:

The correct answer would be A) cell wall.

In a plant cell, the cell wall is the outermost layer mainly composed of cellulose. It provides protection, support, structure et cetera to the cell.

It provides mechanical support and strength to the cell and regulates the direction of cell growth.

It helps the cell in withstanding the turgor pressure and thus, helps in preventing the bursting of a plant cell in hypotonic solutions. In addition, it also prevents the shrinkage of the cell in hypertonic solutions.

It also protects the cells from invading pathogens such as viruses.

ANSWERED AT 28/03/2020 - 10:30 AM


QUESTION POSTED AT 28/03/2020 - 10:30 AM

My mother, along with all of my godparents, began planning my quinceañera after I turned fourteen. My mother and aunts took me to a bridal shop where I was fitted for a long, white gown, which I would wear at the celebration. I felt my cheeks grow red with embarrassment as the women fawned and fussed over me in the store. I desperately wished that I could just find a hole to crawl into and hide, but there was no way out. My mother, who was in her glory, naturally assumed that the redness in my face was a glow of happiness. I let her go right on thinking that. It was her day, I kept telling myself. I was doing this for her. At last, the big day came. My father cooked up a special breakfast for my brothers and me first thing that morning. I had a queasy feeling in the pit of my stomach, but I was somewhat comforted by my father's easygoing manner and his apparent anticipation of the celebration ahead. After breakfast, my mother helped me dress for the quinceañera. While she was styling my hair, she paused every so often to wipe away a tear of joy that had trickled down her face. I couldn't recall ever having seen my mother quite this happy, and suddenly my heart swelled with affection for her. Two hours later, I found myself standing in the front of a church while all of my dearest friends and family members gazed up at me from the pews. As I looked out on the smiling, supportive faces of all the people I loved, I had an unexpected realization. This day wasn't for my mother after all; it was for me. The church ceremony was followed by a fiesta that lasted all day and into the night. My parents served food that they had worked for days to prepare. A disc jockey played all of the music I loved, and I was showered with beautiful gifts, practical advice, and good wishes from everyone important to me. As I watched my family members celebrate in my honor, I realized that my Mexican heritage was not something intangible, like a bunch of old stories about long-gone relatives. My heritage, I realized, was very real. It was with me at all times, and I was proud of it. What is the purpose of this essay?

To entertain/or to tell a story

ANSWERED AT 28/03/2020 - 10:27 AM


QUESTION POSTED AT 28/03/2020 - 10:27 AM

SCIENCE HELP 10 POINTS Deforestation affects which of the following? Question 1 options: water cycle only carbon cycle only water cycle and carbon cycle none of the cycles Save Question 2 (1 point) Question 2 Unsaved Paving a large parking lot could interrupt or hurt which of the following? Question 2 options: water cycle carbon cycle cellular respiration the Krebs cycle Save Question 3 (1 point) Question 3 Unsaved Acid rain is caused by which of the following? Question 3 options: nitrogen compounds in the soil nitrogen compounds in the air Save Question 4 (1 point) Question 4 Unsaved The enrichment of nutrients in an aquatic environment that causes excessive growth of aquatic plants which increases bacterial growth and consumption of oxygen, resulting in depletion of oxygen in the environment is known as: Question 4 options: eutrophication acid rain deforestation Save Question 5 (1 point) Question 5 Unsaved Excess nitrogen can enter the nitrogen cycle via: fertilizers on farmers fields, sewage waste treatment plants AND car exhaust. Question 5 options: True False

Answer:

1. water and carbon cycle

2. carbon cycle

3. nitrogen compounds in the air

4. eutrophication

5. True

Explanation:

Deforestation is the outright removal of forest layers and conversion of such land to other uses. Forest layers serve as sinks for carbon and also as filters for water running off to streams and seas. Hence, removal of forests affects both carbon and water cycles.

Paving a large parking lot involves covering the soil surface with asphalt, concrete or any other materials. Soil contains millions of aerobic organisms that assist in decomposition of organic matters. Covering up the soil surface will limit the activities of these organisms and negatively affect organic matter decomposition which happens to be a major step in carbon cycle.

Acid rain occur when acidic oxides present in the atmosphere dissolve in rainwater to produce a weak acid. The acidic oxides include, oxides of sulphur, nitrogen, etc.

Eutrophication is the enrichment of water bodies by nutrients such as phosphorus and nitrogen. The enrichment causes a bloom of photosynthetic aquatic organisms and microbes. These blooms lead to high oxygen consumption from the water bodies which can eventually lead to the depletion of oxygen.

Excess nitrogen can enter the nitrogen cycle via fertilizer usage by farmers, sewage treatment plants and exhaust of vehicles. Fertilizers are rich in nitrogen (NPK) and those that are not used by crops enters the nitrogen cycle through the soil. Treated sewage also represents a rich source of nitrogen and when released into the environment, then enter the nitrogen cycle through the soil or water. Smokes emanating from vehicles contain oxides of nitrogen and these enters into the nitrogen cycle through the air.

ANSWERED AT 28/03/2020 - 10:22 AM


QUESTION POSTED AT 28/03/2020 - 10:22 AM

The graph shows the changing levels of hormones during menstruation and ovulation. What happens to hormone levels during ovulation, and why is this important? a.The hormone levels increase to prepare a woman’s body to receive a fertilized egg. b.The hormone levels decrease to prepare a woman’s body to receive a fertilized egg. c.The hormone levels increase, and the next menstrual cycle begins with shedding of the uterine lining. d.The hormone levels decrease, and the next menstrual cycle begins with shedding of the uterine lining.

The given graph shows the levels of the different hormones during the period of ovulation. During the phase of the ovulation, the hormones level increase. This increase in  the levels of the hormones prepare the uterus for the fertilization of the egg. The uterine line is thickened. This is the phase when the LH  (Luteinizing hormone) surge occurs, which refers to the sudden increase in the levels of LH. Moreover, the levels of FH, estradiol, and progesterone are also increased at different rates during ovulation.

Hence, the correct answer is 'option A - The hormone levels increase to prepare a woman's body to receive fertilized egg'.

ANSWERED AT 28/03/2020 - 10:21 AM


QUESTION POSTED AT 28/03/2020 - 10:21 AM

Blastula cells are stem cells, why is this so important?

A single-celled zygote will undergo multiple rounds of cleavage, or cell division, in order to produced a ball of cells, called a blastula, with a fluid-filled cavity in its center, called a blastocoel.In animals with little yolk in the egg, the zygote undergoes holoblastic cleavage, in which the entire zygote is cleaved repeatedly; in animals with a lot of yolk in the egg, the zygote undergoes meroblastic cleavage, in which only part of the zygote is cleaved.The blastula eventually organizes itself into two layers: the inner cell mass (which will become the embryo) and the outer layer or trophoblast (which will become the placenta); the structure is now called a blastocyst.During gastrulation, the blastula folds in on itself to form three germ layers, the ectoderm, the mesoderm, and the endoderm, that will give rise to the internal structures of the organism.

ANSWERED AT 27/03/2020 - 01:01 PM


QUESTION POSTED AT 27/03/2020 - 01:01 PM

What causes hydrogen bonding between water molecules? covalent bonds between water molecules, difference in electronegativity between the oxygen atom and hydrogen atoms, oxygen atoms contain more electrons than hydrogen atoms, ionic bonding

The answer should be the difference in electro negativity because all atoms want to become equal in respect with their charges and an oxygen has a -2 charge and a hydrogen is +1 so 2 hydrogen bonding with 1 oxygen makes and equal charge.

ANSWERED AT 27/03/2020 - 12:58 PM


QUESTION POSTED AT 27/03/2020 - 12:58 PM

Scientists believe that the first life forms to appear on planet Earth were probably similar to which modern organisms?

True they do believe that

ANSWERED AT 27/03/2020 - 12:57 PM


QUESTION POSTED AT 27/03/2020 - 12:57 PM

Biogeochemical cycles _______. a. are not essential for life b. move through abiotic and biotic regions c. are the result of natural disasters d. provide the greatest amount of energy for the Earth

The correct answer is B. Move through abiotic and biotic regions

Explanation:

The biogeochemical cycles refer to different natural cycles such as the oxygen cycle, the water cycle or the sulfur cycle that guarantee different substances and elements that are essential for life and Earth move. Indeed substances in biogeochemical cycles travel through abiotic or non-living regions such as the atmosphere or the soil but also involve biotic ones including ecosystem, animals, and plants. According to this, biogeochemical cycles move through abiotic and biotic regions.

ANSWERED AT 27/03/2020 - 12:51 PM


QUESTION POSTED AT 27/03/2020 - 12:51 PM

Water (H2O) is a _______ _______. A. pure substance B. mixed compound

Water is a pure substance. 

ANSWERED AT 27/03/2020 - 12:51 PM


QUESTION POSTED AT 27/03/2020 - 12:51 PM