Answer:
Explanation:
Some waterborne pathogenic diseases include typhoid fever, viral and bacterial gastroenteritis and hepatitis A. The presence of fecal contamination is an indicator that a potential health risk exists for individuals exposed to this water.
Answer:
Thermotolerant coliform bacteria (commonly referred as fecal coliforms) are the group most frequently used as indicators of fecal pollution because they behave in a similar way to most pathogenic bacteria in the environment, and, during treatment, they are abundant and easy to determine.
b. What will happen to a red blood cell placed in a solution of 10% salt?
Complete each of the following (1-11). Each answer should be a MINIMUM of 5 sentences.
1. Describe the following stages:
a. G1 Phase
b. S Phase
c. G2 Phase
d. Mitosis
e. Cytokinesis
2. How do cells produce new cells for growth and repair?
3. Compare mitosis and meiosis.
4. Describe Gregor Mendel’s contribution to the study of genetics.
5. Describe how you can use a Punnett Square to predict the probability that offspring will inherit a trait.
6. What are phenotypes and genotypes?
7. Summarize the process of DNA Replication.
8. Describe the processes of transcription and translation.
9. What are mutations and how do they increase the genetic variation within a species?
10. What is DNA fingerprinting?
Answer:
The answer will be listed below.
Explanation:
1.)-
a.) G1 Phase- Following cytokinesis, during G1 phase the cells monitor environment for the potential growth factors, grow larger and once achieve the threshold size then starts the progression through S phase.
b.) S Phase- To produce two similar daughter cells, the complete DNA instructions in the cell must be duplicated. DNA replication occurs during this S phase.
c.) G2 Phase- During the gap between DNA synthesis and mitosis, the cell will continue to grow and produce new proteins. At the end of this gap is another control checkpoint to determine if the cell can now proceed to enter Mitosis and divide.
d.) Mitosis- Prophase, Metaphase, Anaphase, and Telophase occurs in Mitosis. During prophase, the parent cell chromosomes, which were duplicated during S phase, condense and become thousands of times more compact than they were during interphase.
Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. As metaphase continues, the cells partition into the two daughter cells.
Anaphase- In anaphase, the sister chromatids separate from each other and are pulled towards opposite ends of the cell. The protein that holds the sister chromatids together is broken down, allowing them to separate.
During telophase (the final stage), the chromosomes arrive at the cell poles, the mitotic spindle disassembles, and the vesicles that contain fragments of the original nuclear membrane assemble around the two sets of chromosomes.
e.) Cytokinesis- During cytokinesis, the cytoplasm splits in two and the cell divides.
2.) They go through the process of Mitosis. Mitosis consists of four steps: Prophase, Metaphase, Anaphase, Telophase.
3.) Mitosis takes place all over the body, while meiosis only takes place in the sex organs and produces sex cells. Mitosis consists of one stage whereas meiosis consists of two stages. Mitosis produces diploid cells, whereas meiosis produces haploid cells. Mitosis produces two identical daughter cells whereas meiosis produces four genetically different daughter cells.
A similarity between mitosis and meiosis is that they both produce new cells and start with one a single parent cell to duplicate.
4.) Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
5.) The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment.
6.) A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics.
7.) The opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin.
8.) Transcrption-
Initiation- The DNA molecule unwinds and separates to form a small open complex.
Elongation- RNA polymerase moves along the template strand, synthesising an mRNA molecule.
Termination- In prokaryotes there are two ways in which transcription is terminated.
Processing...
Translation- Translation happens in four stages: activation (make ready), initiation (start), elongation (make longer) and termination (stop). These terms describe the growth of the amino acid chain (polypeptide).
9.) A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses. Mutation has introduce a new allele into the population that increases genetic variation and may be passed on to the next generation.
10.) DNA fingerprinting is a method used to identify an individual from a sample of DNA by looking at unique patterns in their DNA.
Definition of the primary structure of a protein
Write two differences between the unicellular and multicellular organisms.
Explanation:
Unicellular organisms contain one cell and all of their functions are based on that one cell whereas multicellular organisms contain more than one cell and there functions are divided amongst different cells like nervous cells, cardiac muscle cells etc..
Unicellular organisms are composed of a single cellMulticellular organisms are composed of more than one cellSimple body organizationComplex body organizationA single cell carries out all necessary life processesMultiple cells perform different functionsThe total cell body is exposed to the environmentOnly the outer cells are exposed to the environmentDivision of labour is at the organelle levelDivision of labour is at cellular, tissue, organs and organ system levelIncludes both eukaryotes and prokaryotesIncludes only eukaryotes
What would happen to the sea otter population if the amount of light available to the kelp
decreased due to construction of new buildings near the coast?
HELP PLEASEEEE
Answer:
forced immagration
Explanation:
they must find the light
in what part of the world is the greatest number of extinctions occuring?
Answer:In what part of the world are the greatest number of extinctions occurring? in deserts in the Arctic in tropical rain forests Q-26329
MARKING PEOPL AS BRAINLIST⚠️
Why does cell size need to be limited?
Where does the DNA come from that is in the parent cell?
Answer:
Your genome is inherited from your parents, half from your mother and half from your father. The gametes are formed during a process called meiosis. Like your genome, each gamete is unique, which explains why siblings from the same parents do not look the same.
The need to be able to pass nutrients and gases into and out of the cell sets a limit on how big cells can be. The larger a cell gets, the more difficult it is for nutrients and gases to move in and out of the cell. As a cell grows, its volume increases more quickly than its surface area.
Explanation:
The need to be able to pass nutrients and gases into and out of the cell sets a limit on how big cells can be. The larger a cell gets, the more difficult it is for nutrients and gases to move in and out of the cell. As a cell grows, its volume increases more quickly than its surface area.\
And as for the DNA, your genome is inherited from your parents, half from your mother and half from your father. The gametes are formed during a process called meiosis. Like your genome, each gamete is unique, which explains why siblings from the same parents do not look the same.
What are the four processes in which matter cycles on Earth?
Answer:In the rock cycle, rocks and matter go through uplift, weathering, erosion, deposition, melting, crystallization, and metamorphism as they travel between Earth's surface and its interior layers. In the water cycle, water particles undergo evaporation, condensation, precipitation, and flow.
Explanation:
Photosynthesis and cellular respiration both involve the use and release of gases. Which
statement correctly identifies the role of gases in the two processes?
F Photosynthesis and cellular respiration both use carbon dioxide and release oxygen.
G Photosynthesis and cellular respiration both use oxygen and release carbon dioxide.
H Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses
carbon dioxide and releases oxygen.
J
Cellular respiration uses carbon dioxide and releases oxygen, while photosynthesis uses
oxygen and releases carbon dioxide.
Answer:
H
Explanation:
Cellar respiration uses oxygen and release carbondioxide, while photosynthesis uses carbondioxide and release oxygen.
How do the equations help explain the role of producers in the ecosystem?
Answer:
Producers are organisms that create food from inorganic matter. The best examples of producers are plants, lichens and algae, which convert water, sunlight and carbon dioxide into carbohydrates. Consumers are organisms that cannot create their food. ... The producers are the foundation of any ecosystem.
Found this on google, hope it helps, have a great day/night and stay safe!
GIVING BRAINLIEST TO FIRST GOOD ANSWER! A LOT OF POINTS PLS ADD EXPLANATION MARINE SCIENCE
A scientist wants to test whether the pH, salinity, or temperature of seawater impacts coral development. He sets up an experiment with three conditions:
Aquarium 1: Normal pH, normal salinity, normal temperature
Aquarium 2: High pH, high salinity, high temperature
Aquarium 3: Low pH, low salinity, low temperature
What factor would improve experimental design the most? (3 points)
Select one:
a. Eliminating Aquarium 1 since it only uses normal conditions
b. Testing one variable at a time and keeping the other two variables constant
c. Using one aquarium and changing the variables from day to day
d. Setting up the variables on a gradient in each aquarium
Answer: The answer is 1
Explanation:
what type of tide has the highest amplitude
Why is it important to have a control group in the experimental design?
The control group is the main one because it acts as a benchmark to balance the results of the experiment.
What is control group in the experiment?Control groups are a principal aspect of true experimental designs. The presence of control groups authorizes researchers to confirm that study results are due to the drafts of independent variables rather than irrelevant variables. The control group of an experiment is a group that is not revealed to the independent variable and thus serves as a benchmark to which to compare the outcome of the experimental group. An experimental group, also known as a use of group, receives the treatment whose effect researchers wish to study, whereas a control group does not. They should be similar in all other ways.
So we can conclude that an example of a control group is a group of individuals in a detached trial that receive placebo pills instead of medication.
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what tool is most likely used to observe salt crystals
microscope
unaided eye
pan balance
telescope
Microscope where “micro” means small and scope is like a tool to see thing and salt crystals are small so be choice is microscope
what are the different parts of microscope ?A microscope is which produces large images of tiny substance and provide observer a close view of minute structures at a convenient scale for examination and analysis.
Anatomically the microscope consist of three structural parts, i.e. head, base, and arm, where head is known as the body and it carries the optical parts in the upper part of the microscope.
Base of microscope is used to support and carries microscopic illuminators and Arms connect the base and the head and the eyepiece tube to the microscope base.
The optical parts are basically applied for the view, magnify, and production of an image from a specimen placed and the various parts.
Eyepiece or ocular located at the top of the microscope with standard magnification is 10X, Eyepiece Tube which carries the eyepiece just above the objective lens.
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Pls help idk remember this
Answer:
??
Explanation:
ntn showz
When the concentration of molecules on both sides of a membrane is the SAME, the solution is
Answer:
When the concentration of molecules of a substance is the same on both sides of a membrane the solution is isotonic.
Explanation:
A given substance, when it has the same concentration on both sides of the membrane, is in equilibrium and the solution is called isotonic, from the extracellular space with respect to the cytoplasm.
The cell membrane is semipermeable to the passage of water and some substances. Hypertonic and hypotonic solutions tend to establish the dynamics of entry and exit of molecules or water, due to the concentration or osmotic gradients that are established, respectively.
An isotonic solution does not generate gradients, because the concentration of molecules is equal in the extracellular space with respect to the intracellular space.
if one species in a community dies out or moves, the community will
Answer:
The community will slowly decline, or be just fine, or be better off.
Explanation:
Wolves being killed in Yellowstone showed that Yellowstone suffered, because there was nothing to kill the elk, so their population exploded and they ate everything.
If certain rats were gone in certain areas, then the community/environment would be fine, because rats eat birds and other small animals (they eat too many of them).
And if stray cats were gone then certain forests would be better off and see an increase in birds population, stray cats eat birds.
Why was the Cherokee writing system important?
Answer:Cherokee was one of the first American Indian languages to have a system of writing devised for it—a syllabary, so called because each of the graphic symbols represents a syllable.
Explanation:
HELP ASAP
When were stem cells first removed from embryos? Why is this controversial?
What are the current U.S. laws regarding embryonic stem cells? In your
opinion, should scientists continue research with stem cells, or if you had a
disease and would benefit from the stem cell therapies, would you want
scientists to continue their research?
Answer:
They should not continue with research of stem cells
Explanation:
Which of the digestive processes above will be found in the chemical change section of the Venn diagram shown above?
Oh
Which phrases describe a metamorphic rock
Answer:
formed by a volcano
Explanation:
Rocks are formed on Earth as igneous, sedimentary, or metamorphic rocks. Igneous rocks form when rocks are heated to the melting point which forms magma . Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.
Answer:
formed from a volcano
Explanation:
i took the test got it right, hope this helps! :)
3. What does the word photoperiod describe?
the length of daylight
the tilt of Earth's axis
the time of migration of various animals
the way plants grow
Answer:
a. or the length of daylight
Explanation:
pho·to·pe·ri·od
/ˈfōdōˌpirēəd/
Learn to pronounce
nounBOTANY•ZOOLOGY
the period of time each day during which an organism receives illumination; day length.
( this is the definition )
Answer:
The length of daylight, or also the way the plants grow. depends on what school program you use. Hope it helps :)
Explanation:
The diagram shows how specialized body cells can develop. Which of the following best explains why cells that contain the same genetic material do not develop into the same types of cells
Answer:
Can you provide the diagram?
Explanation:
Answer:
A
Explanation:
A particular triplet of bases in the template strand of a coding sequence of DNA is AAA. The anticodon on the tRNA that binds the corresponding mRNA codon is
Answer:
AAA
Explanation:
5. Condensation
6. Evaporation
a. Liquid water changes into water vapor.
b. Water vapor changes into liquid water in the clouds.
Answer:
5 condensation - b water vapor changes into liquid water in the clouds
6 evaporation - a liquid water changes into vapor water
Explanation:
sorry if I'm wrong
Answer:
5 condensation - b water vapor changes into liquid water in the clouds
6 evaporation - a liquid water changes into vapor water
Explanation:
Someone please help me on this one thanks
Answer:
25 degrees
Explanation:
if you look at the highest point and trace down, it goes to almost 25, so 25 results in the highest rate
Answer:
D
Explanation:
That is where the highest point is
Do snails have brains?
Answer:
I am pretty sure that snails don't have brains. Correct me if I am wrong
Explanation:
benefits and drawbacks of synthetic food products?
Answer:
First We're going to look at the benefits of synthetic food products
To make food Taste better.To improve the nutritional composition of a product (Increase the vitamin content by adding ascorbic acid.To maintain the nutrient Composition of the food and to keep it saafe to eat.Explanation:
Now we're going to look at the drawbacks of Synthetic food products
Artificial food colors can cause intestinal upset and breathing problems.g The gastrointestinal tract has 4 basic layers. Which layer is the one that comes in contact with the food that you eat?]
Answer:
Muscularis propria
Explanation:
The gastrointestinal tract has the following four basic layers:
1. Mucosa is the innermost layer
2. Submucosa is underneath the Mucosa
3. Muscularis propria
4. Adventitia is the outermost layer
Muscularis propria is the one that comes in contact with the food that you eat.
I need fast answer please!
Explain how 1st and 2nd law of thermodynamics applies to the trophic structure of an ecosystem?
Answer:
First law: In the ecosystem, the energy flow from lower levels of the food chain to the highest levels
Second law: During energy transference between trophic levels, the main part of the energy is lost as heat and other processes.
Explanation:
The first law of thermodynamics states that the energy can not be created or destroyed, but instead it is transformed into one type to another. Moreover, the second law states that when energy is transformed an important proportion of this energy is lost as heat, and it increases the entropy level.
In an ecosystem, the energy flow is unidirectional, it means that energy flow from primary producers to primary consumers, then from primary consumers to secondary consumers and so successively in all levels. Moreover, organisms fight against entropy by converting foods into energy (which is used to maintain order within their cells. During the feeding process, the energy intake is not 100 % efficient, it means that most part of the energy is lost as heat (approximately 90%), thereby increasing the entropy in the ecosystem.
