Living in rural environments can be difficult due to the distance from the major centers and amenities of urbanization, since the way in which the human pecies has adapted to live in a community is direct linked to technologies that are sometimes nor available in a rural region. The lack of diversity of functions can also become a hindrance, since the rural region have agricultural activities or related to agriculture as the marjor, or in some cases the only, possibility of branch of work.
To the environmental the increase in people living in a rural region is the increased comsumption and exploitation of local natural resources, as well as the urban expansion for housing construction and other infrastructures. The population growth in the region can inevitably leads to climate changes and modifications in the fauna and flora.
Which of the following would be a reasonable conclusion if hair was found to have a drug in the root but not in the rest of the hair strand?
Drug use is not identified.
Drug use is currently happening.
Drug use stopped several weeks ago.
Drug use has occurred for several months.
Drugs use different mechanisms to incorporate and fixate into the hair, and these are useful to determine if a person is currently consuming drugs or not, and for how long. Option B) Drug use is currently happening.
How are drugs incorporated into the hair?
Several studies have been done to explain drug incorporation mechanisms in hair. Among different mechanisms, the most significant ones are,
Active or passive diffusion from blood to the dermal papilla from which hair grows.Through sweat and other secretions.From the environment that might deposit drugs on hair.
Usually, before making a drug analysis, hair must be washed to avoid considering external environmental drugs deposited on hair (the last option).
Once drugs incorporate into the hair, they bond to different components composing highly stable complexes that can not be altered for several years. In fact, drugs can remain in the hair for hundreds of years.
According to this information, if after the analysis drugs were only found in the hair root, it might suggest that drugs are recently and currently being consumed.
Option B is correct. Drug use is currently happening.
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Answer: The answer is C
Drug use stopped several weeks ago!
Explanation:
I got it right on the Exam! Hope I helped :)
I need help with this practice problem solving *I will send another picture of my question
answer and explanation
What adaptation allows the conifers to grow so much taller than the ferns?
The adaptation that allows the conifers to grow so much taller than the ferns is the presence of vascular tissues such as the xylem and phloem.
What are the xylem and phloem?The xylem and phloem are two fundamental plant tissues only present in higher plants that are required to transport nutrient products in arborous vascular plants such as angiosperms and gymnosperms.
Therefore, with this data, we can see that the xylem and phloem are two plant tissues that play essential roles in transporting nutrients to all plan tissues in higher vascular plants.
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How many chromatids make up each chromosome in G1?
Answer:
2 sister chromatids
Explanation:
Answer:
2 sister chromatids
Explanation:
Each chromosome composed of 2 sister chromatids . The daughter cells now close in to the 3rd and last phase of meiosis : meiosis II .
Scientists analyze sequences of genetic material from two siblings. They determine that one characteristic is different between them.
Which of the following best describes the next steps the scientists should take to determine the exact difference?\
a. They should look at the sequence of genes in the chromosomes for that trait.
b. They should look at the sequence of the DNA bases in the gene for that trait.
c. They should look at the sequence of genes in the DNA bases for that trait.
d. They should look at the sequence of chromosomes in the gene for that trait.
The next steps the scientists should take to determine the exact difference is that they should look at the sequence of genes in the DNA bases for that trait.
Genes- The fundamental structural and operational component of heredity is a gene. DNA is the component of genes. Some genes serve as blueprints for the synthesis of proteins. Many genes do not, however, code for proteins. The few thousand DNA bases to even more over 2 million bases make up a gene in a human.
DNA- The information molecule is DNA. It contains information needed to create proteins, which are other big molecules. These instructions are dispersed throughout 46 lengthy structures called chromosomes that are found inside each of our cells. Numerous smaller pieces of DNA, known as genes, make up these chromosomes.
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Randulf is planning an archaeology birthday party and wants the party to mimic the process that archaeologists follow. During which phase should Randulf tell his guests to draw sketches of their findings and take field notes?multiple choice1. interpretation2. reconnaissance3. curation4 .excavation
the answer is interpretation thei field notes where they try to interpret what was in the field and reconstruct the events that took place
Standard NCES.7.L.2.2-Two tall plants (homozygous dominant) are crossed. What are the expected phenotypes of the offspring?
Group of answer choices
all short plants
all tall plants
some tall plants and some short plants
one tall plant and the rest short plants
Why are the studio habits of mind important
Answer:
because it helps guide and if inform choices
Explanation:
Atrazine is one of the most widely used herbicides throughoutthe world. Some studies have shown that the chemical has affectedthe sexual development of frogs, most notably, leopard frogs (Rana pipiens).femalemaleOne study suggested that male tadpoles exposed to the herbicide develop into female frogs. These mutated female frogs, accordingto the study, have the ability to reproduce with other males. However, the mutated frogs can only produce male offspring.This case demonstrates howA. the activities of organisms can change the environments in which they live.OB. chemicals introduced to the environment by humans affect only the organisms they were designed to affect.OC. factors in the environment can change the characteristics of organisms.D. chemicals introduced to the environment by humans have no effect on the ecosystem.
The case the exersice tells is an example of how introduced subtances to a particular environment have a negative impact on the species' health, as states the C answer option: "factors in the environment can change the characteristic
When reading the nutrition facts on a food label, total fats is a measure of
Answer:
If a food has less than 0.5 grams of saturated fat in the serving size on the label, the food maker can say it contains no saturated fat. Remember this if you eat more than 1 serving. You should also pay attention to trans fats on any food label. These fats raise "bad" cholesterol and lower your "good" cholesterol.
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please help. Due in the morning.
Answer: See below
Explanation:
The Male P1 Mouse: BB
The Female P1 Mouse: bb
The first photo shows the genotype of the F1 generation, they are now heterozygous because they contain different alleles (Bb).
The black B is the dominant trait so they will all be black because they all have that B allele.
The second photo shows the F2 generation and shows that one of the four offspring would have bb which would be white while all others will be black.
number 1 in the diagram above is a representation of a/an
If number 1 is the single strand within the nucleus, it is mARN or messenger ARN. mARN has the genetic information needed to make proteins and carries this information from the DNA nucleus of the cell, to the cytoplasm where proteins are made.
*Explain thoroughly how deforestation affects the fertility of the impacted land?*
Deforestation can have destructive effects on soils. Trees and shrubs shield the ground from the force of raindrops and provide shade that reduces surface soil temperature, which in turn reduces evaporation. Logging and small-scale removal of trees exposes soil to rain splash which loosens and dislodges soil particles, eroding soil and creating a more impermeable bare surface, which increases runoff.
It was found that the majority of soil fertility indices were affected negatively by deforestation and more than half of the organic matter was lost to deforestation, which, in turn, could lead to deterioration in soil quality or land productivity capacity.
Type of Transport Is energy required? How does the transport work? Description of the process. Example of molecules? Phagocytosis Protein Pump Receptor Mediated Endocytosis Simple diffusion ExocytosisFacilitated diffusion PinocytosisOsmosis
Active transport is one of the three types of substances transport accross the membrane. It needs energy to occur because it moves molecules against their electrochemical gradient. Pump protein and carrier proteins are involved in active transport. Phagocytosis, Endocytosis, Exocytosis, Pinocytosis are examples of active transport.
What is active transport?Active transport is one of the three cellular transmembrane types of transport. The other two are passive transport and simple diffusion.
Active transport acts against the electrochemical gradient, so it does need energy to transport substances.
It carries molecules from a low-concentration side of the membrane to a high-concentration side.
The energy used comes from
ATP ⇒ Primary active transportMembrane's electric potential ⇒ Secondary active transportCarrier proteins are involved in active transport.
Pump proteins, like Na-K pump, expell Na and enters K into the cell.
Among the different types of active transport we can mention endocytosis, exocytosis, pinocytosis, and hagocytosis.
These processes refers to molecules transport mediated by vesicles. It occurs from and into the cell and needs energy to happen because it is active transport.
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Ligament hold A. Bone to boneB. Bone to muscles C. Tendons to bonesD. Cartilage to tendons
Answer: A.
Explanation: A ligament is a fibrous tissue that connects bone to bone. Usually holds to serve as a structure together and keep them stable.
DNA consists of nucleotides: each identified by the _________ it contains.A. phosphoric acidB. ribosomeC. baseD. carbon backbone
Nucleotides are composed of a sugar molecule (ribose in RNA and deoxyribose in DNA), a phosphate group and a nitrogen-containing base (which can be Adenine, Thymine, Guanine and Cytosine in the case of a DNA). Of those three parts, the only one that changes (and therefore identifies the nucleotide) is the nitrogen containing-base. Therefore, the correct answer is C. base.
A beavers build a dam behind a dam water forms a pond What effect can this have on the organisms living in the ecosystem
Beavers build dams that build wetlands which will result to flooding. Attraction of insects is also an outcome because of the effect of flooding that will kill tress and build impediments. Other organisms will now live in the area because homes will be provided by such act. Beavers actions will increase biodiversity.
Answer - Option A
In a soil profile, which is the most fertile layer?
Answer
C
Explanation
Topsoil is the most fertile layer of soil, it is rich in microorganisms, humus and minerals.
How can I find Ways in which we can prevent Deforestation and how can I find solutions given in Specific countries?
A way deforestation can be prevented could be with socialization campaigns that help more people know, for example, the impacts these practices have upon the wildlife. The solution in specific countries can vary in the sense that different governments implement different practices and depend on the forest's resources differently.
Which of these statements is true with regard to this animation?
sodium and potassium ions are transported against their concentration gradients.
the cell is not expending energy.
sodium ions are transported down their concentration gradient.
potassium ions are transported down their concentration gradient. the cell does not expend atp?
Option A. Both sodium and potassium ions are transported against their concentration gradient.
A concentration gradient happens when the attention of particles is better in a single area than in every other. In passive shipping, particles will diffuse down a concentration gradient, from areas of better awareness to areas of decreased concentration, until they are frivolously spaced.
A concentration gradient happens when the concentration of debris is higher in a single vicinity than in some other. In passive transport, debris will diffuse down a concentration gradient, from areas of higher awareness to areas of decreased awareness, till they're frivolously spaced.
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Enzymes_______activation energy and______up chemical reactions.
A. lower, speed
B. speed, lower
C. lower, slow
Answer:
A: lower, speed
Explanation:
Enzymes definitely speed up chemical reactions because they are proteins that act as biological catalysts. Catalysts speed up reactions without being used up themselves. They are reusable.
Lowering the activation energy makes the reaction faster because less energy is required to do the same task.
B and C do not make sense because speed activation energy doesn't make sense and slow up doesn't make sense either.
What is Due process clause
Answer:
In United States constitutional law, a Due Process Clause is found in both the Fifth and Fourteenth Amendments to the United States Constitution, which prohibits arbitrary deprivation of "life, liberty, or property" by the government except as authorized by law.
Bison eat Prairie Grasses. When organisms are consumed, an estimated 10% of the energy in the food is fixed into their flesh and is avallable for the next trophic level. Assume the biomass of the prairie grasses at the bottom of your trophic pyramid is 1,000,000 Kg. Predict the approximate biomass of the bison. Show all of your work and clearly label each step, including unit labels.
Bison, like cows and elk, have four stomachs. While you might think that bison can eat four times as much as animals with only one stomach, this is not the case.
What exactly is prairie grass?Prairies are large expanses of flat or rolling grasslands. These grasslands in Minnesota range from sparsely vegetated sand dunes to vast fields of big bluestem up to 8 feet tall, from wet meadows to shortgrass prairies high on the Minnesota River bluffs. Anthropogony Girardi (big bluestem), Panicum virgate (switchgrass), and Sorghastrum nutans are the dominant grasses in the tallgrass prairie (Indian grass). A type of grassland known as mixed-grass prairie exists between the short-grass and tallgrass prairies. The true tallgrass prairie, on the other hand, is dominated by four species: Little Bluestem, Big Bluestem, Indian grass, and Switchgrass. These four grasses are commonly found with a variety of grasses that are too numerous to name.To learn more about prairie grass, refer to:
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Identify the neurons that are nerve cells that carry information between sensory and motor neuronsOptions Sensory neurons Interneurons Motor neurons
Interneurons are responsible for connecting sensor neurons and motor neurons by transferring signals and communicating with each other.
Under normal conditions, the roots of plants grow downward. This illustrates what type of tropism?
Tropism is the growth toward or away from a stimulus, and it happens to plants (it's different than movement). The tropism that's indicated can be of two types: phototropism, when the roots grows away from the stimulus of light, or gravitropism, when the roots are pushed downwards by gravity and grows towards it.
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the topsoil is the most fertile layer of the soil, in this layer there are a great amount of nutrients and microorganisms that allow the adequate growth of plant organisms. This is why the loss of topsoil after deforestation leads to desertification.
Since topsoil is a nutrient-rich soil, it would allow the growth of plant organisms again even though it is an area exposed to mining processes. Therefore, the answer would be the B option.
Answer:the topsoil is the most fertile layer of the soil, in this layer there are a great amount of nutrients and microorganisms that allow the adequate growth of plant organisms. This is why the loss of topsoil after deforestation leads to desertification.Since topsoil is a nutrient-rich soil, it would allow the growth of plant organisms again even though it is an area exposed to mining processes. Therefore, the answer would be the B option.
Explanation:
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1. What is the structure of the brain that helps coordinate the movement of muscles in the body?
A.cerebellum
B.midbrain
C.hypothalamus
D.pons
Answer:
A. the cerebellum help coordinate the movement of the muscles in the body.
People with diabetes have several medical concerns. One concern Is hyperglycemia (high blood sugar concentrations). Hyperglycemla for extended times can cause damage to the cells of blood vessels, leading to risk of heart attock, stroke, kidney disease, and more. Using osmosis, explain why hyperglycemid would be clamaging to blood vessel cells.
Diabetes can cause high blood glucose levels, which can harm your blood vessels as well as the nerves that regulate your heart and blood vessels. Heart disease may eventually result from this injury.
Those who have diabetes typically have heart disease at a younger age than those who do not. When compared to those without diabetes, adults with diabetes have approximately twice the risk of developing heart disease or stroke.
The good news is that actions you take to control your diabetes can also help reduce your risk of developing heart disease or stroke.
Why is the blood sugar level of a diabetic individual so high?However, after the majority of the cells that generate insulin are destroyed, the pancreas is unable to produce enough of it, which prevents the glucose from entering the cells and causes an excess of glucose to be produced of dissolved blood sugar floating through the circulation. Risky complications may result from this. The name of this ailment is diabetic ketoacidosis.
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If your nanodrop is giving you a plasmid DNA concentration of 178.9 ng/µL what is the volume of sample, you need to take in order to have 10 ng DNA final concentration?
Please help!!
Thanks.
The volume of the solution is obtained as 0.056 µL.
What is the concentration?We know that the term concentration refers to the amount of substance that is present in a sample. In this case, we are told that you have a plasmid DNA concentration of 178.9 ng/µL. We are now being asked for the volume of the sample that is needed so that we can have 10 ng DNA final concentration.
Let us now look at the parameters that we have from the question and these are;
Concentration = 178.9 ng/µL
Mass of the sample = 10 ng
Volume of the sample = ???
We know that the volume is going to be obtained as the ratio of the mass to the concentration of the solution from the data that we have and have been itemized in detail above.
Given that we have;
Volume = mass/concentration
Volume = 10 ng /178.9 ng/µL
Volume = 0.056 µL
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Explain how nucleotide subunits link to form a single DNA strand.
A nucleotide if formed by three parts: a phosphate group, a pentose (deoxirribose) and the nitrogenous bases (A, T, G and C).
Nucleotides are linked by phosphodiester bond, while nitrogenous bases are linked by their complementary base (Adenine with Thymine and Guanine with Cytosine) by hydrogen bonds.
