A Community is composed of a population of a species plus populations of other species. Thus, the correct option is A.
What is Population?A Population may be defined as a group of individuals belonging to the same species living in the same area at a given time. Some demographic characteristics of a population are size, density, birth rate, death rate, population dispersal, etc.
A community may be defined as a group of individuals belonging to different species living in the same area at a given time.
An ecosystem may be defined as a place or area where individuals of different species along with abiotic factors live together and interact with one another for the purpose of food, shelter, and space.
The Abiotic community deals with the existence of abiotic factors like temperature, rainfall, fire, winds, mountains, hills, etc.
Therefore, a Community is composed of a population of a species plus populations of other species. Thus, the correct option is A.
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When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). Which two classes of DNA do these different samples represent
Answer:
Leading strand and Okazaki fragments
Explanation:
The two classes of DNA that the different samples represent include the leading strand and the Okazaki fragments.
The large molecules DNA with thousands/millions of nucleotides constitutes the leading strand of the DNA while the short stretches of DNA with just a few thousand nucleotides in light constitute the Okazaki fragments.
This is because, during replication, the leading strands of DNAs are usually synthesized in a continuous manner and end up forming a long, continuous daughter strand while the lagging strands are usually synthesized in short, discontinuous fragments known as the Okazaki fragments.
The continuous/discontinuous replication of the leading/lagging strands of the DNA is due to the characteristics of the enzyme responsible for adding bases to the growing daughter strands. The DNA polymerase enzyme can only add nucleotides in the 5' to ' direction.
why aphids are mostly found in the daytime ?
Answer:
When daytime high temperatures are between 90 degrees Fahrenheit
Which ecosystem service would suffer from the opening of a mineral mine along a small mountain range?
A. Cultural
B. Provisioning
C. Regulating
D. Supporting
Answer:
D. Supporting
Explanation:
Ecosystem services include provisioning, regulating, culture and supporting services.
Opening of a mineral mine along a small mountain range will affect the supporting services of ecosystem because supporting services deals with soil formation, provision of habitat and nutrition cycle.
Opening of mineral mine will destroy the tosoil, landscape, forests and wildlife of mountain area which affect the supporting services such as habitat and soil formation.
Hence, the correct answer is "D. supporting".
The data collected from an experiment shows that as the temperature outside goes up, the number of swimmers at the local pool
goes up. This data shows a/an
Select one:
O a direct relationship
b. indirect relationship
c. inverse relationship
O d. no relationship
Answer:
The goal of disinfection of public water supplies is the elimination of the pathogens that are responsible for waterborne diseases. The transmission of diseases such as typhoid and paratyphoid fevers, cholera, salmonellosis, and shigellosis can be controlled with treatments that substantially reduce the total number of viable microorganisms in the water.
While the concentration of organisms in drinking water after effective disinfection may be exceedingly small, sterilization (i.e., killing all the microbes present) is not attempted. Sterilization is not only impractical, it cannot be maintained in the distribution system. Assessment of the reduction in microbes that is sufficient to protect against the transmission of pathogens in water is discussed below.
Chlorination is the most widely used method for disinfecting water supplies in the United States. The near universal adoption of this method can be attributed to its convenience and to its highly satisfactory performance as a disinfectant, which has been established by decades of use. It has been so successful that freedom from epidemics of waterborne diseases is now virtually taken for granted. As stated in Drinking Water and Health (National Academy of Sciences, 1977), "chlorination is the standard of disinfection against which others are compared."
However, the discovery that chlorination can result in the formation of trihalomethanes (THM's) and other halogenated hydrocarbons has prompted the reexamination of available disinfection methodology to determine alternative agents or procedures (Morris, 1975).
The method of choice for disinfecting water for human consumption depends on a variety of factors (Symons et al., 1977). These include:
its efficacy against waterborne pathogens (bacteria, viruses, protozoa, and helminths);
the accuracy with which the process can be monitored and controlled;
its ability to produce a residual that provides an added measure of protection against possible posttreatment contamination resulting from faults in the distribution system;
the aesthetic quality of the treated water; and
the availability of the technology for the adoption of the method on the scale that is required for public water supplies.
Economic factors will also play a part in the final decision; however, this study is confined to a discussion of the five factors listed above as they apply to various disinfectants.
The propensity of various disinfection methods to produce by-products having effects on health (other than those relating to the control of infectious diseases) and the possibility of eliminating or avoiding these undesirable by-products are also important factors to be weighed when making the final decisions about overall suitability of methods to disinfect drinking water. The subcommittee has not attempted to deal with these problems since the chemistry of disinfectants in water and the toxicology of expected by-products have been studied by other subcommittees of the Safe Drinking Water Committee, whose reports appear in Chapter III of this volume (Chemistry) and Chapter IV (Toxicity) of Drinking Water and Health, Vol. 3.
Organization of the Study
The general considerations noted in the immediately following material should be borne in mind when considering each method of disinfection. Available information on the obvious major candidates for drinking water disinfection—chlorine, ozone, chlorine dioxide, iodine, and bromine—is then evaluated for each method individually in the following sections. Other less obvious possibilities are also examined to see if they have been overlooked unjustly in previous studies or if it might be profitable to conduct further experimentation on them. Disinfection by chloramines is dealt with in parallel with that effected by chlorine because of the close relationship the former has to chlorine disinfection under conditions that might normally be encountered in drinking water treatment.
an example of biogeochemical cycle would be the A. carbon cycle B. fire cycle C. trophic cycle
Answer:
Carbon Cycle
Explanation:
which type of cell(s) contain ribosomes?
Answer:
Ribosomes are found in prokaryotic and eukaryotic cells; in mitochondria, chloroplasts and bacteria. Those found in prokaryotes are generally smaller than those in eukaryotes. Ribosomes in mitochondria and chloroplasts are similar in size to those in bacteria. hope this is good enough to help you
Explanation:
what are the major groups of animals and how to they differ
What is chromosomes?Write in brief about the structure of a chromosome.must include all points with explanations
Answer:
Please find the detailed explanation below
Explanation:
A chromosome is thread-like material that carries the long strands of the genetic material (DNA), which in turn carries the gene. The chromosome is the found form of nuclear material in the nucleus.
Due to the long nature of the DNA molecule, they cannot fit into the cell. Hence, to ensure they fit, the cell wraps the DNA molecule around a set of protein called HISTONE proteins to form a NUCLEOSOME. Each nucleosome is made up of DNA coiled around a set of 8 proteins called HISTONE OCTAMER. The nucleosome structure becomes more compacted and further wound around the histone to form a CHROMATIN. This chromatin then undergoes condensation to form the visible CHROMOSOME structure.
Arrange the sentences in order to describe how oxygen from air is transported to the cells in the kidneys.
Answer:
The pulmonary veins carry oxygenated blood to the heart. Air enters the bronchioles in the lungs and reaches the alveoli. The capillaries join together to reach the arteries, transferring the oxygen. The oxygen-rich blood moves from the aorta and reaches the kidneys through a series of blood vessels.
While performing an experiment, it is important to:
a. change the control setup
b. test many different variables at the same time
c. reach a conclusion
d. record observations and measurements
Answer:
D
Explanation:
While performing an experiment, it is important to record observations and measurements, as in Option d. Option d is correct regarding the facts of the experiments, while the others are wrong.
What is an experiment?The experiment is carried out to observe the hypothesis, and in this process, a control set-up is taken whose value or result is already known, and the variables are taken and compared with the control. The controls set should never change in the experiment because the variables are tested with reference to them, and the measurements and observations of the experiment should be taken into consideration to prove the hypothesis. All the variables should not be tested at once because if this is done, it would introduce error into the experiment, and not all the experiments are done to get the conclusion.
Hence, while performing an experiment, it is important to record observations and measurements, as in Option d.
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Which of these best matches an object in the solar system with its characteristic? (3 points)
O comet - orbits a planet
O meteor - a streak of light
O asteroid - has a tail
O planet - orbits the moon
Answer:
Meteor → a streak of light
Explanation:
Got it right on the test
A meteor is a streak of light.
What is a solar system?The sun and the group of celestial bodies that are bound by gravitational force form a solar system. It was formed about 4.6 billion years ago.
What is a comet?A comet is a relic covered with dust, rock, and ice. It was formed during the solar system's formation. They have a diameter ranging from a few miles to tens of miles.
What is an asteroid?They are either metallic or rocky bodies and do not have atmospheres. Asteroids come in a variety of sizes and forms.
What is a planet?Planets are massive astronomical bodies that are neither stars nor remains of stars. They have an orbit and there are 8 planets in our solar system.
What is a meteor?A meteor appears as a bright streak of light in the sky. It is a space rock that enters the earth's atmosphere. It is often known as a shooting star or falling star.
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Find the weight of a pine tree that has a circumference of 14 inches and a height of 120 feet. Use the equation: W = b0 + b1(D2H)
Answer:
The answer is below
Explanation:
The weight of trees is calculated using the equation:
[tex]W=b_o+b_1(D^2H)[/tex]
W is the tree weight in tons, D is the diameter of the tree in inches, H is the height of the tree in feet and [tex]b_o \ and\ b_1[/tex] are constants.
The circumference is given by:
Circumference = 2πr
Where r is the radius and 2r is the diameter
Therefore:
14 = 2(22/7)× r
14 = (22/7)×2r
2r= 14 × 7 / 22
Diameter = 2r = 4.455 inches
[tex]W=b_o+b_1(4.45^2*120)\\W = b_o+2381.643b_1\\Let\ us\ assume\ b_o = -35,b_1=1.9.\\Therefore\\W = -35+2381.643(1.9)\\W=4490 \ tons[/tex]
Scientists want to track the wind speeds and precipitation for a hurricane that will affect the entire East Coast of the United States. Which weather equipment would be best to measure the impact of the storm for this entire region? A. an anemometer B. a rain gauge C. Doppler Radar D. global positioning system (GPS)
Answer:
A anemometer an instrument for measuring the speed of the wind, or of any current of gas.
GPS is to see where you on on the earth so this is a no.
rain gauge only shows the amount of rain so this is a no
Doppler radar determine's the location and velocity of a storm, clouds, precipitation. So therefore, this is your answer.
Explanation:
A gamete is best described as what?
A. The protective outer layer of an egg cell.
B. An enzyme in a sperm used to digest the egg cell's membrane.
C. A haploid cell produced for reproduction.
D. A diploid cell produced for reproduction.
Answer:
C. A haploid cell produced for reproduction.
Explanation:
The term "gamete" refers to reproductive cells such as sperm and ova. Sperm and ova are both haploid cells that unite to form diploid cells.
What results if a broken chromosomal fragment becomes reattached as an extra segment to a sister or non-sister chromatid? A Duplication B Inversion C Polyploidy D Nondisjunction
Answer:
The correct answer is option A "Duplication".
Explanation:
Chromosomal duplication is defined as a type of rearrangement of genetic material at which extra copies of a DNA fragment are created. In this case if a broken chromosomal fragment becomes reattached, this fragment will represent an extra copy, and therefore the resultant genetic material is considered a chromosomal duplication.
The image shows a food web in an Arctic ecosystem. Rising temperatures in the Arctic Ocean can lead to large die-offs of phytoplankton, which are autotrophs. What would most likely happen in an Arctic ecosystem if the phytoplankton population decreased?
Answer:
as the population of phytoplankton decreases, the amount of food for zooplancktons decreases
Adequate food safety practices lead to less: A:Food waste B:Insurance costs C:Hospitalizations D:Training
The answer to this question is HOSPITALIZATIONS
Food is very important as it is contains the source of energy. However, food can easily be contaminated majorly by MICROORGANISMS, hence, the reason they must be well kept and preserved. Every individual should oblige by the safety rules that guide handling of food (cooked or raw).Some of the safety rules include;
* Proper washing of hands before and after cooking* Cook food thoroughly* Separate cooked and raw food* Keep food at safe temperatures etc. Therefore, adequate food safety practices will help reduce HOSPITALIZATIONS caused by disease causing agents.Learn more at: https://brainly.com/question/14608053
Hospitalizations will be less if adequate food safety practices are adopted.
Adequate food safety practices lead to less hospitalizations in the society because most people hospitalize due to bad food habits and food poisoning. If we implement safety measures related to food then we can save ourselves from various diseases as well as prevent ourselves from going to the hospital so in my opinion hospitalizations will be less if sufficient food safety measures are adopted by the people.
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2. How are each of the following groups likely to feel about the reintroduction of wolves in Yellowstone National Park? (write 2-3 sentences for each)
a. Tourists who visit the park
b. Environmentalists (people who want to protect the nature of Yellowstone)
c. People who live near the park
Answer:
a) Good
b) Good
c) Bad
Explanation:
Tourists who visit the park feels good about the reintroduction of wolves in the park because it is a new animal they are seeing in the park. Environmentalists also feels good because this action is a step towards the protection of organisms present in the nature. People who live near the park does not feel good because wolf is a dangerous animal and if he escaped from the park, the lives of the people will be in danger.
who discovered micro organisms
Robert Hooke is the person that discovered Micro organism
Answer:
An English architect, "Robert Hooke" discovered micro organisms in 1665.
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Common symptoms of iron-deficiency anemia include muscle weakness, shortness of breath, and lightheartedness. Why does iron deficiency cause these symptoms?
Answer:lack of blood flow and blood concentration
Explanation:
____is associated with deamination of protein
Answer:
Deamination is the removal of an amino group from a molecule
Deamination is associated with deamination of protein
Answer:
in humans , deamination takes place primarily in the liver, it can also occur in the kidney. if there's excess protein intake , deamination is used to break down proteins with amino acids for energyAtmospheric nitrogen can be fixed by nitrogen-fixing bacteria. Arrange the following forms of nitrogen from the atmospheric N stage to the final form that enters the roots. 1. Ammonia 2. Nitrogen gas 3. Ammonium ion 4. Nitrite 5. Nitrate
Answer:the answer is ammonia
Explanation:the nitrogen fixing bacteria fix the nitrogen as ammonia
Proteins in the cell membrane have many functions. Which type of protein would be used for cell recognition and as a receptor? A. Pore proteins B. Endoplasmic proteins C. Glycoproteins D. Integral proteins
Answer:
C. glycoproteins
Explanation:
Glycoproteins are proteins containing glycans (oligosaccharide carbohydrates) attached to amino acid side chains. These oligosaccharides are attached to the amino acid chain by a posttranslational modification referred to as glycosylation, a modification generally found in extracellular regions. Glycosylation refers to the chemical reaction in which a glycosyl donor (i.e., the carbohydrate) is attached to a functional group in the protein. The glycosylation sites play distinct functional roles for both cell interactions and cell recognition. Moreover, glycosylation sites are also essential for substrate recognition by an enzyme. For example, secreted cytokines are glycosylated, which is required for their binding to receptors.
Imagine an invertebrate that lives in an estuary where salinity varies cyclically with the tides. If this individual is able to adjust the salt concentration of its body fluids, its salt concentration will have:____. a. a cyclic variation depending upon when the animal drinks. b. regular variations that range from large to small. c. slight fluctuations that are kept within a narrow range. d. a cyclic variation opposite that of the surrounding water.
Answer: Option C.
slight fluctuations that are kept within a narrow range.
Explanation:
An invertebrate that lives in an estuary where salinity varies cyclically with the tides. If this individual is able to adjust the salt concentration of its body fluids, its salt concentration will have slight fluctuations that are kept within a narrow range so has to maintain homeostasis and prevent the cells of the the invertebrate from not shrinking which can be due to the salt solution (Hypertonic).
Estuary is an area of water or shorelines where river meet the ocean. It normal do have concentration of salts. Organisms that live in estuaries must be able to adapt to their dynamic environments, wich is due to variations in water chemistry includes salinity, as well as physical changes like the rise and fall of tides.
How are the hours of darkness linked to the flowering time in plants?
Answer:
Hope it helps
Explanation:
plants flower as days grow shorter (and nights grow longer) after 21 June in the northern hemisphere, which is during summer or fall. The length of the dark period required to induce flowering differs among species and varieties of a species.
What is each half of a chromosome called?
O A. Demisome
OB. Spindle Fiber
C. Chromatid
D. Centromere
Answer:
cromatidaida
Explanation:
Answer:
the answer is C
''chromatid''
Explanation:
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What do nitrifying bacteria do?
Answer: Nitrifying bacteria such as Nitrosomonas play an important role in providing nitrogen to plants and limiting carbon dioxide fixation. They are found widely distributed in soil or water, where there are large amounts of ammonia, such as lakes or streams into which treated and untreated sewage is pumped.
Explanation:
Answer:
They change Nitrogen to Nitrite and ammonia. Which helps plants to use Nitrogen even though it's in another form.
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name 3 physiological processes of cell membrane?{3mks} plz help me guys
Answer:
the cell membrane is an extremely pliable structure composed primarily of back -to- back phospholipids (a "bilayer")
How does the body prevent the loss of sugar in urine?
Answer:
Drinking enough water prevents dehydration and also helps the kidneys remove extra sugar from the body in the urine. Those looking to reduce blood sugar levels should reach for water and avoid all sugary drinks, such as fruit juice or soda, which may raise blood sugar levels instead.
Explanation:
The Peppered moth is white with black spots, which helps it blend in with the bark on beech trees. The burning of coal in Great Britain caused many beech trees to become black with soot. Over time, the Peppered moth became all black in order to blend in with the new bark color. What type of example is this? homeostasis metabolism organization adaptation
Answer:
adaptation
Explanation:
Adaptation in Biology refers to the process whereby an organism adjust to its natural environment in order to increase its chance of survival or in other words, the organism becomes better suited to its natural habitat by possession of some adaptive features.
In this example, a white peppered moth with black spots initially possess these color combination in order to blend to its natural environment, which is the bark on beech trees. However, due to the burning of coal in Great Britain which caused many of the beech trees to be black, the peppered moths had to ADAPT to this change in environmental color by becoming all black in order to blend in with the new bark color.
Therefore, this is an example of ADAPTATION.
Answer:
adaptation
Explanation:
