Answer and Explanation:
Variable: dissolved oxygen
Title: Oxygen variation as a water quality indicator.
Purpose: To study how dissolved oxygen varies with depth
Hypothesis: The percentage of dissolved oxygen will decrease as depth increases.
Procedure/Method:
Selection of sampling spots, according to the morphometry of the lake, different depth, water currents inputs and outputs, aquatic vegetation, and lake type of use. In each spot water samples will be taken using a Niskin bottle. The sample will be taken from different depth: 5 meters deep, 10 meters deep, and 15 meters deep (photic zone).Dissolved oxygen (DO) will be measured in each sample, by using a multiparameter sensor. In a field sheet to evaluate the parameter, the %DO by site and depth will be recorded.Observations:
%DO in each site and depth will be recorded in order to analyze how it varies with depth.
Data analysis:
According to different indicators of water quality in a lake, the observed %DO will be compared and analyzed to evaluate the sanity state of the lake water. Example of valuation scale,
NORMAL index: Oxygen concentration in the water column is found to be sufficient for the fish survivalREGULAR: Decrease in oxygen concentration at greater depth, values below saturation in the backgroundCRITICAL: Null oxygen concentration in all or part of the column profile of water. Probable fish mortality events.According to the taken data, observations on the study site will be taken, such as the variation in oxygen concentration as it gets deeper, until reaching hypoxia level, where fishes can not survive. Data can be presented in tables and in graphs, in both cases comparing sampling sites and depth, making a focus on the valuation scale.
Conclusion:
Association of the oxygen variation with the sanity state of the lake, microbiology decomposition processes at different depths, eutrophication state, among others.
References:
- Quality monitoring in San Roque waters. INA-CIRSA. 02/26/2013
- Quality Monitoring Program of Water from Los Molinos Reservoir. Articulation and Institutional Synergy for the Water Resources Preservation. Cossavella A, Bazan R. 2018
- Limnology course. Córdoba National University, UNC, 2018
ILL gIVE BRAINLY!
Asian Tsunami: A few ecosystems that live in the ocean. Because, they would still be in the ocean.
5.
6. What are some positive effects of a rapid change to an ecosystem?
7. What are some positive effects of a slow change to an ecosystem?
Answer:
Explanation:
5. "Although there is some disagreement, several types of marine ecosystems are largely agreed on: estuaries, salt marshes, mangrove forests, coral reefs, the open ocean, and the deep-sea ocean. An estuary is a coastal zone where oceans meets rivers."
6. "the ecosystem is changing making it easier for people to live"
7. "A positive effect would be the organism getting the right amount of nutrients if the ecosystem went fast everything would happen so fast that the ecosystem won't turn out right and the fast change with case the wrong amount of nutrients from the change happening so fast."
Which option identifies the workplace hazard category that applies to the following scenario?
A worker repeatedly lifts 70-pound boxes in the same motion, eight hours a day for ten years.
The subject is food processing
Answer:
Muscle injuries
Explanation:.
Answer: The correct answer is Muscle injuries
Explanation: This answer has been confirmed as correct.
Energy is able to stored be but not be changed
Answer:
false
Explanation:
Energy is always being transferred and changes form.
Pyrite breaks down rocks in which of the following processes? A. Deposition/ B chemical weathering/ C. Erosion/ D. Physical weathering?
Answer:
I think physical weathering
Explanation:
Answer:chemical weathering
Explanation:
Capillary action occurs because
A.surface tension is low.
B.adhesive forces are greater than cohesive forces.
C.surface tension is high.
D.cohesive forces are greater than adhesive forces.
E.adhesive forces equal adhesive forces.
PLEASE EXPLAIN !!!!
Option B : adhesive forces are greater than cohesive forces.
Explanation:-
Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules.
what is the process of protein denaturation?
1) is usually temporary and reversible
2) changes the form of a protein, but not it’s function
3) is only possible in proteins with quaternary structure
4) is usually permanent and irreversible
Answer:
4) Is usually permanent and irreversible.
Explanation:
Protein denaturation is when you modify the molecular structure of the protein, which breaks weak links (such as hydrogen bonds). Alters shape of protein through some processes such as applying heat, acids, alkali, etc.
Beth recently became a vegetarian. The doctor suggested beth eats more peas and beans to ensure she gets all of the nutrients she needs. what element might the doctor be trying to give her more of
Answer:
nitrogen
Explanation:
Answer:
Nitrogen!
Explanation:
I took the test!!!
What are the products of cellular respiration ?
how do endangered animals affect the earth?
Answer:
Explanation:
When a species becomes endangered, it is a sign that the ecosystem is slowly falling apart. Each species that is lost triggers the loss of other species within its ecosystem. Humans depend on healthy ecosystems to purify our environment.Question 5
1 pts
Bacteria play a vital role in all of the following processes of the nitrogen cycle expet for
O fixation
O nitrification
O denitrification
O assimilation
Answer:
except for assimilation
Some one pls help need done fast?
Answer:
the correct awnser is B
Explanation:
Sorry i cant explain i gtg but hope this helps
Answer:
Im thinking B, as carrots are very good. If you are allowed, I recommend you do a bit of research
Explanation:
Which chemicals are major contributing to ozone layer destruction?
Answer:
Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).
Cuts heal when growth factors in the dermal layer of the skin signal cells in the epidermal layer to divide. This process takes time and coordination as shown in the figure below. In the past 10-20 years, researchers have conducted many in-vitro and animal studies that have showed promise using growth factors to facilitate healing in impaired wounds, bone regeneration, and nerve regeneration. Researchers hope that the application of growth factors may be used clinically to enhance the wound healing process. The cellular process that enables the cells to grow and develop into tissue is —
Answer:
mitosis
Explanation:
Remember, mitosis is the process where a single cell divides resulting in generally two identical cells, each containing the same number of chromosomes and genetic content as that of the original cell.
essica was looking at the sky one night using a telescope. While looking at the night Sky, she was able to find the Andromeda Galaxy. She asked her older sister what are the differences and similarities between the 3 types of Galaxies? What should her older sister answer? Please remember to support your answer with examples for each.
Atleast 3 complete sentences.
Please help! thank you!
Answer:
Today, the basis for how we classify galaxies is still rooted in morphology, or how the galaxies appear. Astronomers group galaxies by shape, and although there are many different types of galaxies, most fall into one of three categories: spiral, elliptical or irregular.
Explanation:
Barred Spiral Galaxy
Barred spiral galaxies share the same features and functions as regular spiral galaxies, but they also have a bar of bright stars that lie along the center of the bulge, and extend into the disk. The bright bulge has very little activity here and contains mostly older, red stars. The bar and arms have lots of activity.including star formation.
While the classification for barred spirals is the same as it is for regular spiral galaxies, the bar must be considered as well. Short bars correlate to tighter galaxies and will be included in the designation SBa. SBb have longer bars and SBc are the longest. Most astronomers now agree that the Milky Way is a barred spiral galaxy.
Elliptical Galaxy
Elliptical galaxies can be recognized by their elongated spherical shape and their lack of nucleus or bulge at the center. Although there is no nucleus, the galaxy is still brighter in the center and becomes less bright toward the outer edges of the galaxy. Stars, gases and other materials are spread throughout the elliptical galaxy. An elliptical galaxy can be nearly round or long and cigar shaped.
It is believed that a great deal of the mass in an elliptical galaxy is due to the presence of a central black hole. These galaxies have very little activity and contain mostly old stars of low mass, because there aren’t the gasses and dust needed to form new stars.
Irregular Galaxy
Irregular galaxies are composed of gasses, dust, stars, nebulous formations, neutron stars, black holes and other elements common to all galaxies. Irregular galaxies are named so because they have no definite shape, but like all galaxies, they are in constant motion, moving outward and away from the center of our universe. Irregular galaxies are divided into two classifications: Im and IO.
Im galaxies occur most often among irregular galaxies and may show a trace of the spiral galaxy arms. IO galaxies are completely random and can be called chaotic in nature. The Magellanic clouds that border our own Milky Way Galaxy are examples of Im galaxies. Approximately 20% of our galaxies are classified as irregular
Which of the following does not lead to an increase in phytoplankton reproduction?
a.
increased nutrient availability
b.
increased sunlight
c.
increased oxygen levels
d.
increased levels of carbon dioxide
Please select the best answer from the choices provided
A
B
C
D
Answer:
C. increased oxygen levels
Explanation:
edge 2020
Which domain do anteaters belong to?
A. Eukarya
B. Bacteria
C. Prokarya
D. Animalia
Answer: D
Explanation:
Anteaters belong to animalia.
What are the characteristics of animalia?Animalia is one of the basic groups of living things that comprises either all the animals or all the multicellular animals compare animal kingdom, plantae, protista.
There are over 9 million species of animals found on Earth. They range from tiny organisms made up of only a few cells, to the polar bear and the giant blue whale. All of the organisms in this kingdom are multicellular and heterotrophs - that means they rely on other organisms for food.
Characteristics of members of kingdom Animalia are: They are multicellular organisms which do not possess chlorophyll. They are eukaryotic organisms.
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Match the definition/description with the correct term.
A. Character displacement B. Competitive exclusion
principle
C. Ecological niche ` D. Fundamental niche
E. Realized niche F. Resource partitioning
1. When two species compete for exactly the same resources (oroccupy the same niche), one is likely to be moresuccessful.One species outcompetes the other and eventually the secondspecies is eliminated
2. Some species coexist in spite of apparent competition for the sameresources. Closer study reveals that they occupy slightly different niches; dividing up the resources by pursuing slightly different resources or securing resources in slightly different ways.
3. Five species of warblers coexist in spruce trees by feeding on insects in different regions of the tree and by using differing feeding behaviors to obtain the insects
4. Niche shift
5. As a result of resource partitioning, certain characteristics may enable individuals to obtain resources in their partitions more successfully. Selection of these characteristics (or characters) reduces competition with individual in other partitions and leads to a divergence of features.6. Two species of finches that live on two different islands have similar beaks, both suited for using the same food supply (seeds). On a third island, they coexist, but due to evolution, the beak of each bird species is different. This minimizes competition by enabling each finch to feed on seeds of a different size.
7. The resources a population uses in the absence of competitors or under ideal circumstances
8. The sum total of the organismâs use of the biotic and abiotic resources in its environment
9. The resources a population actually uses
Answer and Explanation:
A. Character displacement: This refers to the change of a trait or characteristic. Two species that share the same space must develop different characteristics in order to reduce competition and make better use of resources.
5. As a result of resource partitioning, certain characteristics may enable individuals to obtain resources in their partitions more successfully. The Selection of these characteristics (or characters) reduces competition with individuals in other partitions and leads to a divergence of features.
6. Two species of finches that live on two different islands have similar beaks, both suited for using the same food supply (seeds). On a third island, they coexist, but due to evolution, the beak of each bird species is different. This minimizes competition by enabling each finch to feed on seeds of a different size.
B. Competitive exclusion principle: The competitive exclusion principle establishes that two or more species that share the same niche requirements and are in biological competition for the same resources, won´t be able to coexist indefinitely in the same space if the other ecological factors are constant. When the superior competitor occupies entirely the inferior competitor´s fundamental niche, the superior species has advantages over the other species and monopolizes all the resources. At this point, the inferior species is displaced and must adapt to use other resources changing its behavior, or must migrate to another area where it can get access to its needs, or get extinct.
1. When two species compete for exactly the same resources (or occupy the same niche), one is likely to be moresuccessful.One species outcompetes the other and eventually, the second species is eliminated
C. Ecological niche: The ecological niche is the synthesis of all the environmental factors that influence the growth, survival, and reproduction of species. These factors also include the interaction between species.
8. The sum total of the organismâs use of the biotic and abiotic resources in its environment
D. Fundamental niche: The fundamental niche refers only to physic conditions in which a species can live and survive in the absence of any interaction with other species.
7. The resources a population uses in the absence of competitors or under ideal circumstances
E. Realized niche: The realized niche refers to the restricted conditions in which a species can live and survive as a result of environment physic characteristics and the interaction with other species.
9. The resources a population actually uses
F. Resource partitioning: Resources partitioning refers to one dominant species monopolizing the resources, and the other inferior species use other resources -partially or completely-, migrates or get extinguished. A way in which species can divide resources is by living in different habitat areas. These species might eat the same food, and can roost in different places within the habitat. This resource partitioning and differentiation in the function of their physic location allows both species to coexist more effectively.
2. Some species coexist in spite of apparent competition for the same resources. A Closer study reveals that they occupy slightly different niches; dividing up the resources by pursuing slightly different resources or securing resources in slightly different ways.
3. Five species of warblers coexist in spruce trees by feeding on insects in different regions of the tree and by using differing feeding behaviors to obtain the insects
HURRY PLEASE ITS FOR A TEST
8. Solutions that have more OH-than H+ ions are
*
acids
bases
buffers
neutral
Answer:
bases
Explanation:
A substance that contains equal numbers of H+ and OH- ions is considered neutral (pH 7). If a solution has more H+ than OH- ions, it is considered acidic and has a pH less than 7. If a solution contains more OH- ions than H+ ions, it is considered basic with a pH greater than 7.
Question 6 of 25
Which force helps water molecules stick together?
A. Gravitational pull
B. Tonic bonds
C. Magnetic pull
O D. Hydrogen bonds
Answer:
the answer should be hydrogen bonds. but not sure
What is the ratio of hydrogen and oxygen in all carbohydrates when compare to carbon ____hydrogen: _____oxygen
Can anyone tell me this ?
Answer:
n(C1H2O1)
Explanation:
Think of glucose, which is C6H12O6. In the case of glucose, n would be 6.
What can plants teach us?
Answer:
How they absorb water and sunlight, and breath CO^2 and breath out oxygen. Absorb nutrients in soil
Explanation:
What molecule makes up 3/4 of the Earth's surface and all life could not survive without it?
Answer:
Ozone
Explanation:
Ozone is a molecule made up of three atoms of oxygen. It works a lot like sunscreen, blocking out harmful ultraviolet (UV) rays from the sun. In recent years, the amount of ozone in the atmosphere has decreased. So will the Earth, and all of the life on it, get sunburned?
Explain how the following factors could affect crop yield.
(i) Increasing the temperature of the glasshouse
Answer:
Increase in temperature increases the amount of transpiration and the plants will lose lots of water by which it will die
why lenses in a microscope is important. essay
Answer:
So you can see what is on the glass slide
Which statements best describe plasmas? Check all that apply.
Plasmas have a definite volume.
Plasmas can change shape.
Plasmas contain ionized particles.
Plasmas are abundant on Earth.
Plasmas are good insulators.
Answer:
Plasmas can conduct electricity
Plasmas are created when a lot of energy is applied to a gas.
Plasmas contain ions and free electrons.
Explanation:
edge 2021
Statements best describe plasmas are:-
Plasmas can conduct electricityPlasmas are created when a lot of energy is applied to a gas.Plasmas contain ions and free electrons.What is plasmas?Plasma is superheated matter so hot that the electrons are ripped away from the atoms forming an ionized gas. It comprises over 99% of the visible universe. In the night sky, plasma glows in the form of stars, nebulas, and even the auroras that sometimes ripple above the north and south poles.To know more about plasmas here
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The part of cellular respiration in which glucose breaks down is referred to as
Answer:As the glycolysis.
Hope it helps
How do bacteria help plants grow?
They break down carbon dioxide into carbon and oxygen.
They protect plants from pollution from acid rain and hydrocarbons.
They change ammonia into nitrogen gas for plants to use to make proteins.
They change nitrogen into nitrates plants use to make proteins.
Answer:
They change nitrogen gas into nitrates for plants to make proteins.
Explanation:
Nitrifying bacteria and Nitrogen-fixing bacteria work together to convert nitrogen gas into nitrates which plants use to make DNA, RNA, and amino acids (which are used to make other proteins).
Bacteria help to plant growth by changing nitrogen (N element) into nitrates plants use to make proteins.
How do bacteria help plant growth?Bacteria help to plant growth by helping nitrogen assimilation during different metabolic processes.
This nitrogen is fundamental to synthesizing proteins, which are mainly composed of this element.In conclusion, bacteria help to plant growth by changing nitrogen (N element) into nitrates plants use to make proteins.
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which branch of science is related to the study of matter and energy
HELP ! NOW PLEASE AND THANK YOU
Answer:
All of the Above
Explanation:
You can see the craters and mountain ranges from here, and flat lava flows used to be there.
Identify A-D
(The picture is attached)
