1. DNA evidence analysis is an imperfect science. Provide two reasons why this may be the case.
and this is for biomed science pltw and also he said that to use your our words too.
Answers
Answer:
Not all DNA that was found at the scene has to be related to the scene.
Explanation:
Just because DNA was found at the scene, that doesnt mean that they were actually there of guilty. For example, a hair of Person A cound be carried over to another scene on Persons B's clothing.
DNA evidence analysis is an imperfect science because DNA is a very unstable and degradable molecule in the environment, furthermore, an DNA evidence analysis may present DNA molecules that are unrelated to the purpose of the analysis.
A DNA evidence analysis aims to:
Find biological traces in one location.Determine those responsible for activities carried out in that location.Determine the genetic makeup of a living being.This type of analysis is usually done in a place where there was a crime and it is necessary to do a DNA analysis to identify the culprits and victims.
The problem with this analysis is that DNA is a molecule that degrades quickly when outside the body. In addition, a location may have a very large variety of DNAs, which may belong to living beings unrelated to the crime, or to the purpose of the analysis.
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Related Questions
Which of the following is an essential characteristic of an index fossil?
A) The organism lived in a very specific environment or two, such as tropical volcanic islands.
B) The organism lived for a very limited period of geologic time.
C) The fossils of the organism are exceptionally well preserved.
D) The organism lived on the land, not in the ocean.
Answers
Answer:
A. ............... ......
The organism living for a very limited period of geologic time is an essential characteristic of an index fossil, hence option B is correct.
What is an index fossil?A suitable index fossil needs to be unique or easily identifiable, plentiful, have a broad geographic distribution, and have a limited time range.
The correlation of strata and the establishment of time-scale boundaries in geology are both based on index fossils.
There are three qualities of an excellent index fossil: The fossil is easily recognized and well-known. Fossils can be discovered in many different places. The plant or animal did not survive for a sizable amount of time.
Therefore, the abundance, distribution, distinctiveness, and requirement that the fossil is constrained in geologic time are the four primary features that define a good index fossil.
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which part of the plant is responsible for photosynthesis
Answers
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
What would be a good "control" setup if you were testing whether spontaneous generation can occur in a piece of bread?
Answers
Answer:
See the answer below
Explanation:
A good control set up to test whether spontaneous generation can occur in a piece of bread would be to first sterilize the bread in order to ensure that is free from any microbe and then place it in a covered sterile container. The alternate set-up would be to sterilize the bread and then place it in an uncovered sterilized container. Both set-ups will then be observed for a few days for the growth of fungi.
Which are limiting nutrients for plant growth?
water and nitrogen
nitrogen and carbon
carbon and phosphorus
phosphorus and nitrogen
Answers
Answer:
phosphorus and nitrogen
Phosphorus and nitrogen are limiting nutrients for plant growth.
What are limiting nutrients for plant growth?Limiting nutrients are essential elements required for plant growth that are present in the soil in limited amounts. When the availability of these nutrients becomes insufficient, it limits plant growth and productivity. The most common limiting nutrients for plant growth are nitrogen, phosphorus, and potassium.
Nitrogen is an essential component of amino acids, proteins, and chlorophyll, and is a crucial nutrient for plant growth and development. Phosphorus plays a vital role in photosynthesis, energy transfer, and cell division. Potassium is required for enzyme activation and water regulation in plants.
Other essential nutrients like calcium, magnesium, and sulfur may also become limiting in certain soil conditions. The availability of these nutrients can be improved through fertilizer application or by incorporating organic matter into the soil. Proper management of limiting nutrients is essential for maximizing plant growth and productivity.
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Which statement best describes a disruption in nucleic acid sequence?
A. The nucleic acid is exposed to extreme temperature, causing denaturation.
B. New hydrogen bonds are formed, breaking the bond in the structure of the nucleic acid.
C. The lack of energy will cause the bond between the growing peptide chain to be broken.
D. The addition of an enzyme will inhibit the production of the R group in the structure.
Answers
Answer:
B. New hydrogen bonds are formed, breaking the bond in the structure of the nucleic acid.
Explanation:
Nucleic acids are one of the four major biomolecules in living systems. They function to store and transmit genetic information in living organisms. Nucleic acids are polymers made up of NUCLEOTIDE monomeric units. DNA and RNA are the two nucleic acids in nature.
However, since the complementary nucleotide bases that make up nucleic acids interact together via HYDROGEN BONDS i.e. G-C, A-U, if new hydrogen bonds are formed, breaking the bond in the structure of the nucleic acid will disrupt the nucleic acid sequence
Answer:
A. The nucleic acid is exposed to extreme temperature, causing denaturation.
Explanation:
I took the quiz
1. Earth's layers vary in pressure. The pressure decreases or increases as
you move towards the core? *
Your answer
Answers
I want to design an experiment to see if drinking coffee
makes students score higher on tests.
1. What would be the experimental group?
Answers
Answer:
Explanation: the Experimental group would be a congregation of students.
are viruses capable of photosynthesis?
Answers
Explanation:
scientists have found that a virus can stimulate photosynthesis in bacterial host, so im guessing yes.
Alcoholics often have trouble with night blindness. This results from...
A. impaired absorption of several B-vitamins.
B. fluid accumulation in the eye.
C. damage to the brain cells.
D. imparired absoption and transport of vitamin A.
Answers
Answer: A. Impaired absorption and transport of A Vitamins
Explanation:
How does the density of liquid water compare with the
density of ice?
Answers
Answer:
The normal pattern for most compounds is that as the temperature of the liquid increases, the density decreases as the molecules spread out from each other. ... The ice structure takes up more volume than the liquid water molecules, hence ice is less dense than liquid water.
what are functions of nucleotides besides DNA and RNA
Answers
Answer:
They enable protein production.
Explanation:
How do the unique chemical properties of water affect water’s ability to occur in three states of matter?
Answers
Answer:
Water's unique properties
In the solid state, the particles of matter are usually much closer together than they are in the liquid state. So if you put a solid into its corresponding liquid, it sinks. Water's boiling point is unusually high. Other compounds similar in weight to water have a much lower boiling point.
Explanation:
The unique properties of water ( a polar molecule, it is able to form multiple hydrogen bonds, which account for many of water's special properties. ... Because of their partial positive and negative charges, polar molecules such as water can attract each other) give it it's ability to occur in the three states of matter
Water is made up of two hydrogen (H) atoms and an oxygen (O) atom. And water is unique in that it is bipolar, where the molecule has a slightly positive charge on one side (where hydrogen atoms are attached), and slightly negative on the oxygen
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Range:
5.3
m:
Find the standard deviation by filling in the following table.
Heights (x)
x-1
5.4
7.2
4.9
9.3
7.8
8.1
8.5
5.4
7.2
10.2.
Mean (*)
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.2
8.2
-2.8
-1
3.3
1.1
-4
1
3
-2.8
-1
2
(x-3)?
7.84
1
10.89
1.21
.16
1
.09
7.84
1
4
35.03
€ (x-2)
Standard deviation: 3.892
Interpret the standard deviation in the context of the problem.
Answers
Answer: wassujhit
Explanation:
kjuygkftrdeszdxfcgvhbjnkiugfdxszazdxftgyhuijknj hgf
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer: it is B
Explanation:
which of the following statements would be the most INCORRECT if there were a sudden decline in plants on earth?
Answers
You did not put any choices.
The statement that is most incorrect if there were a sudden decline in plants on earth is the rate of photosynthesis in existing plants would decline. The correct option is b.
What is the importance of plants on earth?Plants are autotrophs, and they produce food for themselves and other consumers like animals and humans. As plants consume carbon dioxide, they reduce the warmth of the earth and thus maintain the temperature of the earth.
Photosynthesis, the method used by plants and other autotrophic organisms to make food, converts carbon dioxide into glucose and oxygen, both of which are vital for life.
The number of plants would not decrease the rate of photosynthesis, as more carbon dioxide will increase photosynthesis.
Therefore, the correct option is b, The rate of photosynthesis in existing plants would decline.
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The question is incomplete. Your most probably complete question is given below:
The amount of oxygen will decline.
The rate of photosynthesis in existing plants would decline.
All of the choices are correct.
The heat of the earth will increase.
What is energy?
Options:
anything that has mass and takes up space
phases: solids, liquids, and gases
all the "stuff" in the universe
the ability to do work
Answers
Answer:
answer is the ability to do work
1) The steps of the scientific method are observation, problem question, _______ , experimentation, analyze data and make conclusions, and report results.
Answers
Answer:
I guess the missing piece should be Hypothesis.
A moss begins to grow on a rock in an area that was previously uninhabited by life. This is an example of a .
Answers
Answer:
pioneer species
Explanation:
In all of our cells there is a blueprint of life called DNA. Which characteristic does this fact best describe?
Living things respond to their environment.
Living things maintain internal balance.
Living things are based on a universal genetic code.
Living things grow and develop.
1 2 3 4
5
Answers
Answer:
Living things are based on a universal genetic code.
Explanation:
DNA, also known as deoxyribonucleic acid is a nucleic acid responsible for storing genetic information in living cells. The genetic code refers to the series of nucleotides that are expressed into a protein molecule. It comprises of all the codons (group of three nucleotides) in an organism.
All living organisms are said to contain a nearly universal genetic code because the same genetic code is found in almost all living organisms. For example, AUG codon corresponds Methionine amino acid in almost all organisms.
Therefore, a blueprint of life called DNA is traceable to the fact that Living things are based on a universal genetic code.
Please help me anything helps.
Answers
Answer: at the center of tectonic plates hope this helpsヾ(•ω•`)o
Explanation:
Answer:
A
Explanation:
A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere.
Most earthquakes occur along the edge of the oceanic and continental plates. The earth's crust (the outer layer of the planet) is made up of several pieces, called plates. The plates under the oceans are called oceanic plates and the rest are continental plates.
Why do pioneer species decrease over time?
Answers
Answer:overtimer other species are found in the disturbed area.
hope that helps
Choose all the answers that apply.
Multicellular organisms
Answers
Answer:
where are the answer lol
Explanation:
Make a hypothesis! Make sure to include if____then___becuaee in the statement! Worth 20 points!!
Answers
Answer:
You could write something like, if the water temperature is colder, then it will evaporate sooner.
Explanation:
This is really the best I got, sorry if I'm no help.
Which is NOT true of the cell theory?
All living organisms are composed of cells
All living organisms are composed of cells
All cells have a nucleus, which acts like the brain of the cell
All cells have a nucleus, which acts like the brain of the cell
All cells come from preexisting living cells
All cells come from preexisting living cells
the cells is the most basic part of a living organism
Answers
Answer:
All cells have a nucleus, which acts like the brain of the cell
Explanation:
prokaryotic cells don't have a nucleus
A _____
serves as a long-term storage area for water or nutrients.
Answers
Answer:
same joey
Explanation:
Answer:
reservoir and atmosphere
Wind power is ? 1. Prevalent in denmark 2. Non-polluting 3. Renewable 4. All of these
Answers
Answer:
All of these
Explanation:
Because it's renewable and non-polluting
Answer:
It is All of these
Explanation:
hope this helps.
Choose either “Diary 24” or “Diary 33” from The Freedom Writers Diary by Erin Gruwell and the Freedom Writers. Evaluate the text you choose by determining its value according to your standards.
Answers
Answer:
The correct response will clearly establish the student's personal criteria for 1) what makes a work valuable and 2) the characteristics and elements of a good piece of writing. Advanced responses will also compare the text to other texts that serve as good examples. Appropriate responses must evaluate the text based on the personal criteria set forth by the student and establish whether or not the text is valuable.
Explanation:
This is on Ed.
19. Scientists experiments to make sure the
results are meaningful.
a. perform
b. repeat
C. conclude
d. communicate
Answers
Answer: B.
Explanation:
this is how scientists make sure they did there steps correct
There are many more______than there are primary consumers
Answers
Answer:
producers
Explanation:
when Damian went for evening walk he smelt sweet fragnance of flowers. Which process causes this phenomenon?
1. Diffusion
2. Osmosis
3. Plasmolysis
4. Active transport
Answers
Answer:
the answer is diffusion
