Field tests for blood are more than adequate to establish that a stain is human blood true or falseccj 1640
Answers
Field tests for blood are more than adequate to establish that a stain is human blood, is a false statement.
Thus, field blood tests are not sufficient to prove that a stain is human blood. While first field tests might suggest that a stain might be blood, more laboratory testing is often necessary to identify the stain's origin and whether it is human blood.
Serological testing and DNA analysis are two laboratory procedures that are more precise and dependable in identifying human blood and separating it from other substances or animal blood. Field tests may be helpful as first screening methods, but they are insufficient to prove beyond a reasonable doubt that a stain is made of human blood.
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Related Questions
how do carbon dioxide and oxygen move in and out of a mesophyll cell
Answers
Where are the majority of
chloroplasts found within plants?
A. In the cells of the roots.
B. In the cells of the leaves.
C. In the cells of the flowers.
Answers
Answer:
Leaves
Explanation:
I’m pretty sure that’s the answer because that’s where the sunlights hits and its how the plant makes energy.
Study the graph, and then answer the questions using the drop-down menus.
Which group currently shows a lower percent of adults identifying with it than being raised in it?
Which two groups currently show a higher percentage of people identifying with it than those raised in it?
Answers
Answer:
LOWER = unaffiliated
HIGHER = Catholic
Explanation:
Answer:
A double bar graph titled Religious Shifts in Latin America. The x-axis is labeled Religious Group. The y-axis is labeled Percent of Population from 0 to 100. The left bar is labeled Raised and the right bar is labeled Currently. Raised Catholic is 84 percent. Raised Protestant is 9 percent. Raised Unaffiliated is 4 percent. Currently Catholic is 69 percent. Currently Protestant is 19 percent. Currently Unaffiliated is 8 percent.
Study the graph, and then answer the questions using the drop-down menus.
Which group currently shows a lower percent of adults identifying with it than being raised in it?
✔ Catholic
Which two groups currently show a higher percentage of people identifying with it than those raised in it?
✔ Protestant and Unaffiliated
Explanation:
What is the most important thing we can do to help save coral reefs?
Answers
The most crucial action we can take to help save coral reefs is -
Recycling and safe trash disposal are important because marine debris can affect coral reefs. Recycle your waste wherever you are, especially plastic, and don't forget the three R's (reduce, reuse, and recycle). To prevent trash from being blown or washed into streams and oceans, properly dispose of rubbish in bins.
Never leave cigarette butts in the sand or leave any litter behind on beaches. By helping to pick up trash in your town, you can help keep your rivers and streams clean. Consult the neighborhood. Recycling is the best way to protect coral reefs.
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22. An astronaut on the space station tests whether gravity affects the productivity of tomato plants. What
is the independent variable in this experiment?
Answers
When conducting an experiment, the independent variable is always the one that produces or causes an effect or reaction on the dependent variable. In the exposed situation, the independent variable is gravity.
--------------------------------------
During an experiment, you need to consider all the variables involved.
Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified to analyze how another variable responds to it. The researcher changes the independent variable to observe its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, gravity is the independent variable, and influences the productivity of tomato plants. Dependent variable: Refers to the variable, which response depends on any change in the independent variable. It represents a quantity of something which value depends on how the independent variable is modified. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y. Controlled variables are kept constant in the control groups and the experimental groups. Unlike the independent variable, the controlled variables do not influence the results. These variables do not affect the response of the dependent variable.------------------------
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Draw the atoms in the two molecules of ammonia, which are the products.
Answers
The diagram of the products of two molecules of ammonia which is mentioned in the question is attached below.
What is ammonia?Ammonia is a colorless gas which that consists of one nitrogen atom and three hydrogen atoms. The nitrogen atom is located at the center of the molecule and the three hydrogen atoms are attached to it by the covalent bonds.
The reaction between 2 molecules of ammonia will contain 2 nitrogen atoms and 6 hydrogen atoms, which will result into the formation of a molecule of nitrogen gas and three molecules of hydrogen gas.
2NH₃ ⇒N₂ + H₂
This reaction is exothermic, meaning it produces energy in the form of heat during this reaction, and is a type of synthesis reaction in which two or simpler molecule combines to form a complex molecule.
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Answer:
Explanation:
pluto/edmentom
Which motion of particles across a membrane requires energy
Answers
Active transport
Explanation: There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.
Happy to help; have a great day! :)
Answer:
the answer is b
Explanation:
i did the test
Plz help me its only 1 question
Answers
Answer:
the first one
Explanation:
the car slowly started and accelerated
Its the second one. Since its continually accelerating.
Which of the following is NOT a type of white blood cell?
*Erythrocyte (a red blood cell type)
Neutrophil
Basophil
Lymphocyte
Answers
Answer:
Erythrocyte is not a type of white blood cell.Erythrocyte delivers oxygen to the tissues in our body.
Answer:
An erythrocyte is not a white blood cell
Explanation:
Is climate science historical science, operational science, or
is it both? How does one’s worldview affect how they view climate
change? Pick a stance and defend your answer.
Answers
Climate science is a combination of both historical science and operational science. Climate science involves understanding the Earth's past climate and current climate and predicting future changes.
Operational science is focused on studying current natural phenomena, while historical science examines past events that are not currently happening or can't be observed anymore. Climate science combines the two as it studies past climate changes and current climate changes, and uses that information to make predictions about the future. Hence, climate science is both historical science and operational science.
A person's worldview can affect how they view climate change. For example, those who believe that human beings are the primary cause of climate change may advocate for increased environmental protection measures. Others may be more skeptical about the role of human activity in climate change, believing that it is part of a natural cycle that has happened before. Still, others may deny the existence of climate change entirely, believing that it is a hoax or exaggeration by the media or scientists. I believe that climate change is real and largely caused by human activity, but I understand that others may have different views based on their worldview and experiences. It is essential to consider different perspectives and gather as much information as possible to make informed decisions about how to address climate change.
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How is a species’ population dynamics affected by the presence of another species with the same niche?
Answers
Answer:
If two species occupied the same niche, they would be competing for the exact same resources. The competitive exclusion principle states that one of the species would drive the other to extinction.
Two species would be in direct competition for the same resources if they both occupied the same niche. According to the competitive exclusion principle, one of the species would inevitably wipe out the other.
What is niche?It defines how an organism or population responds to the distribution of resources and competitors.
(for instance, by growing when resources are abundant and when predators, parasites, and pathogens are scarce) and how it then modifies those same factors.
According to the competitive exclusion principle, often known as Gauss's law, two species that are vying for the same resource in the same habitat but occupy distinct niches cannot coexist at constant population values.
Two species can dwell peacefully in ecological niches without facing any rivalry. It encourages diversity and keeps the food chain in balance.
Therefore, population dynamics affected by the presence of another species with the same niche.
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Pls answer this question 7
Answers
Answer:
E
Explanation:
E makes the most sense because it is the only answer that talks about making energy and using that energy to move, which is what the bird is doing.
Which of the following statements is true about all members of a species?
a. they are seasonally isolated from each other
b. they are geographically isolated from each other
c. they can reproduce and produce fertile offspring
d. they have identical genes
Please answer quickly!!!
Answers
Ex: Ligers and mules
what's a Gologi apparatus
Answers
Answer:
a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
Explain the connection between kinetic energy and Mass
Answers
Answer:
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
Explanation:
Your welcome
Answer:
They have a direct relationship. As mass increases, kinetic energy increases as well.
Explanation:
hope this helps!!!
Which structure connects muscles to bones?
bone marrow
cartilage
ligament
tendon
Answers
Answer:
tendons
Explanation:
The Mesozoic Era would last how many days?
Answers
Answer: Following the Paleozoic, the Mesozoic extended roughly 186 million years, from 251.902 to 66 million years ago when the Cenozoic Era began. This time frame is separated into three geologic periods. From oldest to youngest: Triassic (251.902 to 201.4 million years ago)
If the main features and contours of the ocean floor were fully mapped, scientists would
be better able to study and understand wave refraction. What is the MOST likely reason
that this is the case?
A:Refracted waves can turn into whirlpools far above ocean basins.
B:Waves curve more tightly around sunken objects like shipwrecks.
C:Waves slow and change direction due to friction with the seabed.
D:Refraction occurs most frequently over ocean trenches or valleys.
Answers
The option (D) is correct. Refraction occurs most frequently over ocean trenches or valleys.
What do you mean by refraction?Refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium.
Moreover, light waves change speed when they pass across the boundary between two substances with a different density , such as air and glass. This causes them to change direction.
Therefore, the bending of light (it also happens with sound, water and other waves) as it passes from one transparent substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light.
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3. Describe the meaning of the term "apoptosis,"
and state its importance.
Answers
Differences in domesticated animals over relatively short periods of time most likely occur through...
a) evolution
b) artificial selection
c) experimental selection
d) adaptation
e) natural selection
Answers
The differences in domesticated animals over relatively short periods of time most likely occur through artificial selection. Artificial selection is the process of humans intentionally selecting and breeding certain traits in domesticated animals to produce desired characteristics, such as larger size or higher milk production.
This differs from natural selection, which occurs in the wild and is based on survival of the fittest. Evolution, adaptation, and experimental selection may also play a role, but artificial selection is the most significant factor in the rapid changes seen in domesticated animals.
Artificial selection is the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.
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As before, you self several wild-type plants from the F2 and again determine that some of them are pure-breeding.What can you conclude from these results?For each statement, choose the correct response by selecting only from the three answer choices to the left of that statement. Drag the correct answer to the right of each statement.
Answers
The conclusions from these results are as follows:
1. true2. recombination3. 9:3:44. recessive epistasisA recessive epistasis occurs when one gene's recessive allele conceals the expression of all alleles of another gene. Here's an example of epistasis in the mouse characteristic of hair colour. In a Punnett square, it shows recessive epistasis. For polygenetic hair colour, both parent mice are heterozygous, BbCc.
Labrador retriever colour is a frequent example of recessive epistasis. Color genes in Labrador retrievers only come in black or chocolate, however yellow Labrador retrievers emerge when recessive epistatic genes at the 'extension' locus prevent colour from reaching the fur. Dominant epistasis occurs when a dominant allele hides the expression of both recessive and dominant alleles at other loci. When the recessive allele covers the expression, it is called recessive epistasis.
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Which type of individuals within a species is most likely to survive and reproduce.
A. The most intelligent.
B. The best camouflaged against predators.
C. The strongest.
D. The best adapted to their environment.
Answers
what will happen if the relative humidity is 100 percent, and the temperature begins falling?
Answers
Answer:
It will start to rain.
Explanation:
Multicellular organisms have ___ cell(s)
A) one
B) two
C) many
D) no
Answers
Answer:
C.
Explanation:
"Multi" in multicellular means multiple or many. :)
what is biodiversity ??
Answers
Explanation:
biodiversity is biology lesson
biodiversity is one part of around biodiversity means skin
When scientists compare molecular clocks between species, they
have to use the same segment of DNA. Which of these statements
would explain why that is necessary?
A. Not every segment of DNA mutates.
B. Different genes mutate at different rates.
C. Species accumulate neutral mutations at random rates.
D. All mutations cause harmful effects.
Check Answer
Answers
Answer:
ITS B: DIIFERENT GENES
Explanation:
Answer:
Yeah same here
Explanation:
The reason is mutation rates differ between species and even between different regions of the genome of a single species. These different rates of nucleotide substitution are measured in substitutions (fixed mutations) per base pair per generation.
The bulky shape of fat cells make them ideal for performing which of the following functions of connective tissue?
Bone movement
Nutrient transport
Filling spaces
Body support
Answers
The bulky shape of fat cells makes them ideal for filling spaces of connective tissue. The fat cells represent a type of connective tissue.
The adipose tissue is a type of connective tissue composed of fat cells known as adipocytes.
These cells (adipocytes) are specialized cells that store fats, which can be produced by the human body or obtained from the diet.
The shape of the adipocytes can be spherical, oval, polyhedral (as part of adipose connective tissue), etc.
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Answer: Filling spaces
Explanation:
In cellular biology, what is the definition of the word specialized?
a. adapted to a specific function or condition
b. carried across the cell membrane by a specific protein
c. a structure within a eukaryotic cell that performs a specific
function
o d. containing unique dna
submit
Answers
Answer:
adapted to a specific function or condition
with the letters in red please help make an acronym or sownthing
memorable to hell memorize these genetic changes. such
as mutation within a gene, mutation within regulatory DNA sequence.
and if possible with their definitions too
Answers
To remember the genetic changes of mutations within a gene and regulatory DNA sequences, we can create an acronym “GMG and MRD.” GMG stands for Genetic Mutation within Gene, while MRD stands for Mutation within Regulatory DNA sequence. These genetic changes are significant in genetic and molecular biology researches.
A mutation is an alteration in the DNA sequence that can occur in genes, chromosomes, or proteins. This alteration can have a significant effect on the organism, including developmental disorders, genetic diseases, or cancer.The GMG mutation occurs when the genetic sequence of a gene is changed, leading to the alteration or absence of a protein that can affect its normal function. Mutations within a gene can be caused by errors during DNA replication, exposure to mutagens, or spontaneous changes in DNA sequences.
Examples of MRD mutations include the HbF gene mutation that causes resistance to malaria in African populations. In summary, GMG and MRD are essential genetic changes that need to be remembered in genetic researches.
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Which of the following best explains why humans need constant supplies of fresh water? a. Humans need a constant supply of water to provide them with essential vitamins. B. Humans need a constant supply of water to maintain proper hygiene. C. Constant supplies of freshwater are needed because body water is continually being lost. D. Constant supplies of freshwater are not actually necessary for survival. Please select the best answer from the choices provided A B C D.
Answers
Answer:
C. Constant supplies of freshwater are needed because body water is continually being lost.