How is mitochondrial DNA (mtDNA) typing used in forensic science?
A suspect’s mtDNA sample is matched to an unknown sample of nuclear DNA that was found at a crime scene.
A suspect’s mtDNA sample is matched to an unknown sample of mtDNA that was found at a crime scene.
A suspect’s nuclear DNA sample is matched to an unknown sample of nuclear DNA that was found at a crime scene.
A suspect’s nuclear DNA sample is matched to an unknown sample of mtDNA that was found at a crime scene.

Answer:

Hypothesis: Adding fertilizer to tomato plants will result in faster growth and larger yields of fruit.

Experiment:

Observation: Two identical tomato plants are selected for the experiment. One will be the control group (without fertilizer), and one will be the experimental group (with fertilizer).

Research: The types of fertilizer available, their recommended usage, and their impact on plant growth and yields are researched.

Variable selection: The independent variable will be the use of fertilizer, while the dependent variables will be plant growth and fruit yield.

Experimental setup: The tomato plants are grown in identical pots, with identical soil and sunlight exposure. The control plant receives no fertilizer, while the experimental plant receives a recommended amount of fertilizer every other week.

Data collection: Over a period of two months, measurements are taken of the height and width of the plants, as well as the number and size of the tomatoes produced.

Data analysis: The data collected is analyzed for any differences in plant growth and fruit yield between the control and experimental groups.

Conclusion: Based on the data collected and analyzed, a conclusion is drawn as to whether or not the hypothesis was supported by the experiment.

Further experiments: If the hypothesis is supported, further experiments may be conducted to determine the optimal amount and frequency of fertilizer for tomato plant growth and yield.

Explanation:

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Oxygen will form oxyhemoglobin and not hemoglobin oxide because it is referred to as a`protein which binds to oxygen atoms in the blood.

This refers to a protein in the body which carries oxygen molecules to various parts of the body. This is as a result of the compound which is referred to as heme which is responsible for the high affinity for oxygen. It ensures oxygen is distributed to other parts of the body.

On the other hand, formation of oxides means that a chemical reaction occurred with oxygen. There is however no chemical reaction formed as a result of this affinity which is why there is no formation of hemoglobin oxide in this specific type of scenario in the body system.

This therefore is the reason why oxygen forms oxyhemoglobin but not hemoglobin oxide and makes it the most appropriate choice.

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Answer:

inside the nucleus

Explanation:

protons and nuetrons are in the nucleus, electrons are the ones that orbit a nucleus

Answer:

Collection of cells that help to protect the root apical meristem root cap. Protect the area of cell division in the root - root cap. Senses gravity in order to help the root determine the direction of growth  - root cap. An outgrowth from the root's zone of cellular maturation - root hair. Where actual water and mineral absorption happens in roots root hair. Increase surface area of roots for efficiant water and nutrient absorption - root hair.

Explanation:

ROOT CAP- The root cap is a type of tissue that covers the tip of the root. It's also known as Calyptra. The root caps contain statocytes, which are involved in plant gravity perception. . The root will expand in a random pattern if the cap is carefully removed. In plants, the root cap covers the developing tip. In plants, the root cap covers the developing tip. It secretes mucilage to help the root pass through the soil more quickly, and it may also interact with the soil microbiota.

The root cap's function is to allow the root to develop downward while protecting the sensitive tissue in the root.

ROOT HAIR-  A root hair, or absorbent hair, is a tubular outgrowth of a trichoblast, a hair-forming cell on the epidermis of a plant root. It is located on the rhizoid of a vascular plant. Branched lateral extensions of a single cell are only seen on rare occasions. They are visible with both the naked eye and a light microscope. They can only be found in the root's maturation zone. Phosphorylase activity is increased just before and during the growth of root hair cells. Osmosis is the process by which plants extract water from the soil. Root hair cells have evolved to speed up osmosis by having a wide surface area. They also have a big permanent vacuole, which is another adaptation.              

Answer:

Explanation:

From the given question; we are to fill in the blanks with the appropriate words. The appropriate words that fit in perfectly can be seen below.

\(\text{Collection of cells that help to protect the root apical meristem } \ \ \mathbf{root \ cap}\)

\(\text{Protect the area of cell division in the root} \ \ \mathbf{root \ cap}\)

\(\text{Senses gravity in order to help the root determine the direction of growth} \ \ \mathbf{root \ cap}\)

\(\text{An outgrowth from the roots zone of cellular maturation}\) \(\mathbf{ roo t \ hair}\)

\(\text{Where actual water and mineral absorption happens in roots } \ \ \mathbf{root \ hair}\)

\(\text{Increase surface area of roots for efficiant water and nutrient absorption.} \ \mathbf{root \ hair}\)

Answer:

active transport

Explanation:

.

Answer:

D. active transport

Explanation:

Answer: Depolarization

Explanation:

Essential tremor is not a cardinal sign of Parkinson's disease.

Option D is correct.

Parkinson's disease is a disorder affecting the brain that results in unintentional or uncontrollable movements like trembling, stiffness, and issues with balance and coordination.

Early signs of Parkinson's disease include tremors, muscle stiffness, and sluggishness of movement, but there are also other symptoms to watch out for.

Essential tremor is not associated with other Parkinson's disease symptoms.

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Complete question:

Which of the following is not a cardinal sign of Parkinson's disease?

Stiffness

Difficulty moving

Shaking hands and feet

Essential tremor.

Answer:

"all the following are elements but"

Explanation: what is the following imao

If you go on mc3.edu/admissions/applying-to-mccc/testing-and-assessment/assets/biology-placement-test.pdf page 11 it will tell you all the answers to your questions....

Answer:

(B)

Explanation:

Answer: D. no natural selection

Explanation:

Fitness refers to the passing down of genetic make up based on the environmental requirements for reproduction and survival.

Answer choice A is incorrect, as large population, refers to the fact the more individuals in the population, the smaller effect of genetic drift. Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error).

Answer choice B is incorrect, as random mating, refers to each individuals in a population have the same chance of passing on its alleles. An example of random mating includes: lions with darker fur color have the same chance to reproduce as lions with a lighter fur color.

Answer choice C is incorrect, as no mutations, refers to no changes to genes, new alleles are not introduced into the populations gene pool.

D is correct, no natural selection is when no phenotype can have a selective advantage over another - all individuals have equal fitness. And that correlates with the fitness being the same among all individuals in the population.

Answer:

3 community

4 population

5 ecosystem

2 abiotic

1 biotic

Answer: Layers of the Epidermis. The epidermis is the outermost layer of our skin. It is the layer we see with our eyes. It contains no blood supply of its own—which is why you can shave your skin and not cause any bleeding despite losing many cells in the process.

The units of energy entering and leaving the system total 15 units. (Option C)

According to the rule of conservation of energy, "energy cannot be generated or destroyed; instead, it evolves from one form to another." Because you have not provided the given value, it is important to remember that the energy exiting the system equals the energy that entered the system.

In physics, energy is the quantitative quality that is imparted to a body or a physical system and is visible in the form of heat and light. The law of conservation of energy holds that energy can be transformed in form but cannot be generated or destroyed.

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Complete Question:

The energy entering the system is equal to the energy leaving the system. Based on the laws of conservation of energy, how many units of energy are entering the system?

5 units

10 units

15 units

20 units

Answer:

the liquid inside the large central vacuole of aplant cell that serves as storage of materials and provide mechanical energy

Answer:

Explanation:

The physical barriers of the immune system prevent infections since they stop or expel any pathogen that enters the body. The skin with its cells tightly packed and characteristics, the endothelia, and mucous membrane, like the one in our nose, are physical barriers. They stop antigens from infecting our body since they can remove them by sneezing, coughing, or shedding.

Answer:

skin contains tightly packed cells

skin is tough, flexible, and waterproof

you cough when a pathogen enters your mouth

you sneeze when a pathogen enters your nose

Explanation:

They have specialized glands on their body that remove salt from their blood, they "sneeze" out salt.

The amino acids are polar (position 5); polar and uncharged (25); polar and uncharged (205); cysteine (554); and polar charged (979).

Amino acids are the building block of proteins, which may have structural or enzymatic functions.

Amino acids have specific physicochemical properties depending on the nature of their R groups (e.g., polar, charged, etc)

In conclusion, the amino acids are polar (position 5); polar and uncharged (25); polar and uncharged (205); cysteine (554); and polar charged (979).

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Energy transfer in ecosystems occurs through food chains, starting with producers, moving to consumers, and ultimately to decomposers.

In ecosystems, energy transfer takes place through food chains and food webs. The process begins with producers, such as plants, which convert sunlight into usable energy through photosynthesis.

Next, primary consumers, such as herbivores, consume the plants and obtain the stored energy. Secondary consumers, such as carnivores, then consume the primary consumers to gain energy.

Tertiary consumers, like apex predators, eat secondary consumers. Throughout the food chain, energy is lost as heat, and only about 10% is transferred between each trophic level. Finally, decomposers break down dead organisms, returning nutrients to the soil and restarting the cycle.

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Fragmentation is a form of asexual reproduction and is seen in annelids, fungi, cyanobacteria, sponges, and flatworms.

In Fragmentation, an organism divides itself into a number of fragments. It occurs when an organism completely breaks down independently irrespective of the other parts. Each one of these fragments matures into fully grown adults that are clones of the original organism.

Asexual reproduction usually involves the participation of a single parent alone can produce new offspring. The newly produced individual is genetically identical to one another and its parent. Both multicellular and unicellular organisms divide by fragmentation which is asexual reproduction.

Fragmentation is the most common method of reproduction in lower invertebrates. It is seen in many organisms including filamentous cyanobacteria, algae, lichens, molds, many plants, and animals such as flatworms,  annelid worms, sponges, and sea stars.

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The organisms that can reproduce by fragmentation are Option d Sponges and Sea anemones.

Fragmentation is a form of asexual reproduction in which an organism breaks into two or more fragments, and each fragment develops into a new individual. Both sponges and sea anemones are examples of organisms that exhibit this mode of reproduction.

Sponges are simple multicellular animals that lack true tissues and organs. They possess a porous body structure, and when a sponge is fragmented, each fragment has the potential to develop into a new sponge through regeneration. These fragments contain specialized cells called archaeocytes that can differentiate into various cell types required for the formation of a new sponge.

Sea anemones, on the other hand, are marine animals belonging to the phylum Cnidaria. They have a cylindrical body with tentacles surrounding their mouth. When a sea anemone is fragmented, each piece can regenerate into a complete individual. The process involves the differentiation of cells within the fragments, leading to the development of new tentacles, body parts, and eventually a mature sea anemone.

Both sponges and sea anemones have remarkable regenerative abilities, allowing them to reproduce through fragmentation. This form of asexual reproduction enables them to colonize new areas, expand their population, and adapt to changing environmental conditions. Therefore the correct option is D

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The Question was Incomplete, Find the full content below :

The organisms which can reproduce by fragmentation are:

(a) Corals and Sponges

(b) Corals and Spirogyra

(c) Sea anemone and Spirogyra

(d) Sponges and Sea anemones.

Answer: Living things are made of matter and have a characteristic material composition, being made of biomolecules such as proteins, carbohydrates, and nucleic acids.

Explanation:

Life may be partly defined by the ability of living things (organisms) to acquire matter and incorporate it into themselves, i.e., to grow

matter creats objects and life hosts in objects "giving them life" anything that is sentient, has matter

Pattern recognition to an unstable or difficult environment, which results in ecological variety and speciation, is the hallmark of Darwin's finches' evolutionary process.

The majority of finches crack weed and grass seeds with their large, conical bills. Insects are used by several species as food supplements. While seeds are difficult for the nestlings to crack, they are typically given insects instead.

Finches were thought by the Native Americans to be a sign of happiness. True pleasure and joy are well embodied by the Finch, who are known for their colors, singing, and habits. A few native dances incorporate upbeat music to resemble the Finch.

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Answer:

Troponin is an enzyme that will be present

The area around a charge in which the electric force is experienced by other charged objects is the electric field.

The electric field is a property of the space around a charged object and is created by the presence of that charge. Any other charged object placed within the electric field will experience a force exerted on it due to the interactions between the electric charges.

The electric field can be thought of as a field of influence that extends throughout space, representing the force that would be experienced by a positive test charge placed at any given point within the field. The strength and direction of the electric field depend on the magnitude and sign of the charge creating the field. Electric field lines, which are used to visualize the electric field, point away from positive charges and towards negative charges.

The electric field plays a crucial role in understanding and describing the behavior of charged particles and the interactions between them. It is a fundamental concept in electromagnetism and has applications in various fields, including electronics, electrical engineering, and physics.

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Answer:

When a controlled experiment is not possible, why do scientists try to identify as many relevant variables as possible ? You want to find more variables because you need to find the relevant variable in order to identify what is causing the change.

Explanation:

Answer:

Explanation:

When a controlled experiment is not feasible, scientists attempt to identify as many relevant variables as possible because it helps them understand and account for potential confounding factors that may influence the observed outcomes. Here are a few reasons why scientists aim to identify relevant variables:

Reduce Bias: By identifying and accounting for relevant variables, scientists can minimize bias in their observations and analyses. Bias occurs when factors other than the one being studied affect the results, leading to inaccurate or misleading conclusions. Identifying relevant variables allows scientists to control for their potential influence, increasing the reliability of their findings.

Improve Validity: Validity refers to the accuracy and truthfulness of research findings. By identifying and considering relevant variables, scientists can enhance the validity of their research by ensuring that they are examining the actual relationships and effects they intend to study. This strengthens the reliability and generalizability of the results.

Enhance Understanding: Identifying relevant variables can provide a more comprehensive understanding of the phenomena under investigation. It allows scientists to explore potential underlying mechanisms, interactions, and contextual factors that may influence the observed outcomes. This deeper understanding contributes to the advancement of scientific knowledge.

Inform Future Research: Identifying relevant variables, even in non-controlled settings, can guide future research endeavors. By documenting and considering various factors that may impact the research outcomes, scientists can identify areas that require further investigation. It helps in designing more controlled experiments or observational studies in the future to specifically target those variables of interest.

Strengthen Recommendations and Interventions: In fields such as public health or policy research, identifying relevant variables can lead to more informed recommendations and interventions. Understanding the broader context and factors that influence outcomes allows scientists to develop more effective strategies to address the issues at hand.

In situations where controlled experiments are not possible, identifying relevant variables helps scientists better navigate the complexity of real-world scenarios. It allows them to account for confounding factors, improve the robustness of their findings, and contribute to a more nuanced understanding of the research topic.

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Blue-green algae are photosynthetic prokaryotes, while fungi are eukaryotes that obtain nutrition through absorption.

Blue-green algae and fungi are both organisms, but they belong to different domains and have distinct characteristics. Blue-green algae, also known as cyanobacteria, are classified under the domain Bacteria, while fungi belong to the domain Eukarya.

Blue-green algae are prokaryotic organisms, lacking a true nucleus and membrane-bound organelles. They obtain energy through photosynthesis and are capable of converting sunlight into chemical energy. They typically inhabit aquatic environments, such as lakes, ponds, and oceans, and some species can fix atmospheric nitrogen.

On the other hand, fungi are eukaryotic organisms with a distinct nucleus and membrane-bound organelles. They obtain nutrition by absorbing organic matter from their surroundings. Fungi play crucial roles in decomposition and nutrient cycling in ecosystems. They can be found in various habitats, including soil, plants, and even as symbiotic partners with other organisms, such as in mycorrhizal associations.

In summary, the primary differences between blue-green algae and fungi lie in their cellular structure, mode of nutrition, and classification. While blue-green algae are photosynthetic prokaryotes, fungi are eukaryotes that obtain nutrition through absorption. Understanding these distinctions helps in appreciating the diversity and ecological significance of these two groups of organisms.

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Answer:

O all of the above

Explanation:

Stronger social connections have been associated with various positive outcomes, including longer and healthier lives, fewer complications in pregnancy, and increased feelings of security in children. Numerous studies have shown that individuals with strong social networks and support systems tend to have better overall health, lower mortality rates, and reduced risk of certain health conditions. Additionally, social support has been found to positively impact pregnancy outcomes, such as lower rates of preterm birth and improved maternal well-being. Furthermore, children who have secure and supportive relationships with their caregivers and peers tend to experience better emotional and psychological development.