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.

The place where a river begins is called source or headwaters, being the rivers the construction from water that comes of smaller streams that join together forming tributaries.

Micelium, which is formed by a number of filaments, has the main function of penetrating the substrate in search of food and nutrient. Moreover, it can suffer some modifications to form reproductive structures.

The correct option is: B. Nutrient absorption.

The low-pressure areas have a relatively thin atmosphere and that causes air to rise fast to make clouds. Sometimes, a storm is formed due to air can't move downward towards the surface and instead, it converges. Severe storms are mostly observed in low-pressure areas because it has perfect conditions: the air is thin, high wind speeds, and rapid spiral movement. Warm ocean waters are catalysts for these storms.

Answer: The Ocean

Explanation: The ocean contains a vast amount reservoir of carbon this is because of the organisms in the ocean that take carbon dioxide.

Step 1:

The process of DNA transcription occurs from the 5' to 3' being the DNA sequence in the correct order for transcription as follow:

5' TAT GGT AGC GCT AGG ATT TAC ATA AAA TAG CCC CAT 3'

Step 2:

Resulting in the mRNA:

5' AUA CCA UCG CGA UCC UAA AUG UAU UUU AUC GGG GUA 3'

- Being the nucleotide thymine replaced by uracil in the formation of the RNA strand.

Step 3:

The codons sequence that form proline and tyrosine are:

Proline: CCA;

Tyrosine: UAU.

Answer:

The answer is A

Explanation:

An ecologist studies the relationship between living things and their habitats.

When two monosaccharides undergo a condensation process with the removal of one molecule of water from the functional groups, a disaccharide—a kind of carbohydrate—is created.

Dehydration synthesis is a chemical process that converts monosaccharide molecules into poly- or disaccharide molecules. The monosaccharide molecules are united to produce the disaccharide or polysaccharide in such a process, which removes the water-containing components.

A glycosidic bond, a sort of condensation process, is formed when two monosaccharides come together. A water molecule is lost when the carbon of one sugar (often the carbon in position 1) interacts with the hydroxyl moiety of another sugar molecule.

When two monosaccharides are combined and a water molecule is eliminated, disaccharides are created.

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The cell has several types of membrane transport alternatives, being the simple diffusion, facilitated diffusion, and active transport one of the options for the cell to exchange molecules between internal and external environment.

The types of cell transport:

1 - Simple Diffusion: is a process that does not need energy (passive), used to transport small and nonpolar molecules from a region of higher concentration into a region of lower concentration (in the gradient concentration direction);

2 - Facilitated Diffusion: is a process that does not need energy (passive), used to transport larger ions and polar molecules with the help of carrier proteins or pore proteins (transport proteins);

3 - Active Transport: There is two types of active transport, primary active transport is used for molecules moving against their gradient coupled to the hydrolysis of ATP, and secondary active transport is for molecules going with more molecules against their gradient. It is a process that needs energy (active) to happen, going always against the gradient of concentration of the cell.

Plants with chloroplasts carrying out Calvin cycle but unable to carry out light-dependent reactions could not carry out photosynthesis because to produce sugars, the light dependent reactions are essential in order to produce ATP and NADPH.

Calvin cycle is the light-independent reaction that is performed with the help of products from light dependent reactions. The Calvin cycle is accomplished in three steps: Carbon fixation, reduction and regeneration. The product of Calvin cycle is triose phosphate which is further used in glucose production.

Light dependent reactions are those that involved in the production of ATP and NADPH through a series of electron transporters. These ATP and NADPH are therefore used for synthesis of glucose.

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Answer:

Helicase

Explanation:

To begin DNA replication, unwinding enzymes called DNA helicases cause the two parent DNA strands to unwind and separate from one another.

nonsense mutation will cause translation to stop.

Cut off Codon

In DNA or messenger RNA (mRNA), a stop codon is a trinucleotide sequence of three nucleotides that instructs the cell to stop production of proteins. The number of trinucleotide codons is 64. 3 stop codons are present, and 61 define amino acids (i.e., UAA, UAG and UGA).

A DNA change that causes a protein to cease or end its translation earlier than predicted is known as a nonsense mutation or its synonym, a stop mutation. This is a frequent type of mutation that affects both humans and other animals and results in the expression of a protein that is either truncated or ineffective.

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Hardy-Weinberg equilibrium tells that the variation in genetics present in a certain population will remain constant in the absence of any disturbing events from one generation to another. Conditions that are not affecting this principle are natural selection, genetic drift, and mutation. These forces if present in a population will affect the equilibrium which is being maintained by this principle. and will eventually lead to an evolution. Natural selection is present when the organism adapt and change. Genetic drift is present when there are variants forms of genes. Mutation is present when there are permanent changes in the DNA sequence. These processes should be absent in order to mantain the principle of Hardy-Weinberg equilibrium.

Answer - recessive traits

Earth rotate in an orbit around the sun. It takes 365 days, 6 hours, 9 minutes for the earth to complete its revolution around the sun. Its directional rotation to the sun is counterclockwise. Leap year is scheduled on the 6 hours, 9 minutes which is an additional 24 hour every fourth year.

Answer - True

Karyotype have 23 pairs of chromosomes

What is Karyotype ?

Each eukaryotic species' nuclear genome is split up across several chromosomes that are specific to that species. A haploid human nucleus (i.e., sperm or egg) normally has 23 chromosomes (n=23), whereas a diploid human nucleus has 23 pairs of chromosomes. The term "karyotype" refers to an individual's total number of chromosomes. Each of the 46 structures is a replicated chromosome, despite the fact that it is challenging to see the two sister chromatids for each chromosome at this resolution because the cell was in metaphase.

There are 46 chromosomes, as expected. The chromosomes' lengths vary, as you can see. In fact, this characteristic inspired the names of human chromosomes. One is our longest chromosome; two is the next longest; and so on. The chromosomes are often grouped into the pattern depicted , and the resulting picture is known as a karyogamy. A geneticist can ascertain a person's karyotype via a karyogamy, which is a written depiction of their chromosomes that includes any abnormalities.

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Answer:they would turn back white

Explanation:once the soot is gone, they return to natural colour again due to camouflage

Ratite is a group of flightless birds that evolved from a single flightless ancestor.

The potential energy is the energy that depends upon relative position or various part of a system and the potential charge that a molecule have. The molecules of ATP, nitrogen, and glucose have high potential energy, as well as the ion gradient in a cell membrane, however the concentration gradient does not require neregy input, since the energy stored in it is the one used to balance the concentrations.

Answer: Gathering new evidence using new technologies or procedures most likely will lead scientists to change or improve an existing scientific theory (Option D).

Explanation:

Answer: Trisomy 21

Expanation: tTe most common chromosomal anomaly in humans, affecting about 5,000 babies born each year and more than 350,000 people in the United States. Also known as Down syndrome, trisomy 21 is a genetic condition caused by an extra chromosome.

Invasive species are those that have been lost to areas outside their original range and that may cause damage in their new range.

. Answer: "Plants of this ecosystem will be affected"

Explanation: invasive species such as Kuduzu can displace native species by competing for resources or habitat, which alters community structure and can result in the extinction of native species.

In the photo we can see that Kuduzu is a trailing plant that takes away the light from the plants that are below and therefore they do not survive.

.Answer: "Negative consequences are produced in the environment, leading to a loss of biodiversity"

Explanation: each species is related to the rest of the living beings. An autotrophic plant will be at the beginning of a food chain and if it is completely extinguished it will affect each link that continues. All living beings that depended on the presence of the plant will be negatively affected, decreasing their number and therefore leading to a loss of biodiversity.

DNA replication is called semiconservative because, in each copy that is made of the DNA, one of the strands comes from the template. This means that all copies of DNA retain one strand of the original DNA (semiconservative). Therefore, the image that best illustrates DNA replication is A.

The image shows the process of photosynthesis where conversion of light energy to chemical energy took place by cellular respiration thereby releasing sugar in the form of glucose to provide food to plants and other organisms. ATP is produced by glycolysis and electron transport chain which serves as the energy currency of a cell which are synthesized by the mitochondria.

The image shows a representation of the carbon cycle that could also be related to our human body as well. From the image, it shows that sugar are formed by plants using carbon dioxide and the energy from the sun which can develop for their own nutrients. The process of photosynthesis where conversion of light energy to chemical energy took place by cellular respiration thereby releasing sugar in the form of glucose to provide food to plants and other organisms. When animals, even human beings consumes sugar and they can break them in ATP, which is a molecule that contains energy, can be used in multiple processes. ATP is produced by glycolysis and electron transport chain which serves as the energy currency of a cell which are synthesized by the mitochondria. The chlorophyll entagle the energy from the sun and modify it into chemical energy in the form of ATP.

Answer: I'm im 99% sure it's C "It consists of a series of redox reactions" if it's right do you mind giving a brainliest?

The correct answer is FALSE. Although Darwin, indeed recognized reproduction and competition as important drivers of global biodiversity, he did not included the role of inheritance. Rather, he emphasized the role of competition and natural selection.

The answer is the letter A. These mutations can change the structure and function of hemoglobin.

The effect of the mutation in the hemoglobin is it altered its structure that makes

The correct answer is A hydro-power energy.

This type of energy is a renewable energy. A hydropower plant is located always in a river because they are used to transform the kinetic energy of the water and or its gravitational potential energy into power, generating electricity. This process occurs in a turbine.

The main difference between the lytic and the lysogenic cicles is that in the lysogenic cicle, the viral genome incorporates into the host genome (option 1).

Lytic cycle is the cycle in which reproduction of virus using a host cell in order to produce more viruses through the use of host cells. Lysogenic is the one in which there is incorporation of genome in the host cell.

It is either made up of DNA,RNA and viral proteins with the use of certain enzymes inside the genome as well.

The viral genome incorporates into the host genome during the lysogenic cycle. This happens in the case of lysogenic cycle during which the genomic material gets intervened inside the host cell.

In the lytic cycles the viral DNA spreads via the use of host cells and on

It is either made up of DNA,RNA and viral proteins with the use of certain enzymes inside the genome as well.

the other side the lysogenic bacteria or viruses are using the infusion of genetic material inside the host cells.

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A likely reason why some adult chordates do not exhibit all the characteristic features of the phylum Chordata, is that some features are present during development but are subsequently lost or become another structure. (option 2)

Lymphatic system

The lymphatic system is made up of vessels and lymph nodes and its main function is the transport and circulation of fluids that are present in the body's tissues.

Thus, we can say that the lymphatic system resembles the cardiovascular system because the cardiovascular system is also composed of vessels and its main function is to circulate blood in the body.

So "cardiovascular system" is the answer.