Answer;
An example of positive feedback loop is;
-When a pregnant woman begins to go into labor, the body sends hormones that increase the intensity of the labor contractions.
Explanation;
-Feedback loops are therefore the process whereby a change to the system results in an alarm which will trigger a certain result. The result will then either increase the change to the system or reduce it to bring the system back to normal.
-Feedback loops are important because they allow living organisms to maintain homeostasis (maintenance of internal environment of the body constant).
-A positive feedback loop occurs in nature when the product of a reaction leads to an increase in that reaction. It moves a system further away from the target of equilibrium, by amplifying the effects of a product or event and occurs when something needs to happen quickly.
A positive feedback loop in biology is a process in which the end product of an action stimulates more of the same action to occur. An example is during child birth, where hormone release intensifies labor contractions, leading to further hormone release. This continues until the process is complete, differentiating from negative feedback loops which work to maintain homeostasis by reversing a process.
A positive feedback loop in biological systems is a process in which the end products of an action cause more of that action to occur. This contrast with a negative feedback loop, which works to stop a process in order to bring the body back to its set point. One of the examples provided is a classic example of a positive feedback loop: when a pregnant woman begins to go into labor, the body sends hormones that increase the intensity of the labor contractions.
This is a positive feedback loop because the contractions that begin labor lead to the release of a hormone (oxytocin) that intensifies those contractions, which then causes more hormones to be released, and so on until the baby is born.
Other instances, such as when blood sugar is low or the heart rate is high, are illustrations of negative feedback loops, where the body works to maintain homeostasis by reversing a process.
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b. ridge.
c. radial.
2. In 1990, the FBI began a pilot project called _____, which stores DNA profiles from across the country in a series of local, state, and national databases, all linked via computers.
a. IAFIS
b. CJIS
c. CODIS
d. NDIS
3. Impressions produced by the ridged skin on human fingers, palms, and soles of the feet are _____ prints.
a. plastic
b. latent
c. visible
d. dust
4. What is the most commonly used facial composite software in the United States?
a. FACES
b. Identi-Kit 2000
c. CompuSketch
d. SuspectID
5. What is the most significant breakthrough in forensic science since the development of fingerprinting?
a. ballistics tests
b. handwriting analysis
c. DNA profiling
d. investigative psychology
6. What is the process of identifying psychological and social characteristics surrounding the crime as well as the manner in which it was committed?
a. psychological profiling
b. criminal investigative analysis
c. investigative psychology
d. case linkage
7. DNA typing was first described in 1985 by English geneticist
a. James Watson.
b. Edward Southern.
c. Francis Crick.
d. Alec Jeffreys.
8. crime lab’s DNA analysis unit examination and characterization of body fluid is conducted through __________ serological techniques.
a. traditional
b. modern
c. classical
d. neoclassical
9. MitoSearch is a software package used by crime labs to compile and analyze
a. the mtDNA database.
b. criminal histories.
c. arms and ammunition
d. ink and print traces.
10. Two standards have been used to govern the admission of scientific evidence: the _____ test and the Frye test.
a. relevancy
b. Daubert Standard
c. eliminaton
d. reliability prong
1. According to Health, U. S., 1993: The Annual National Report on Health, the right answer is normally the whorl but it's not mentionned in the propositions.
2. The right answer is CODIS
Combined DNA Index System (CoDIS) is the US national database, created and maintained by the FBI. The CoDIS comprises three levels of information: local DNA index systems (LDIS) where the genetic profiles originate, state DNA index systems (SDIS) that allow laboratories in the same state to share information, and the index system of national DNA (NDIS) that allows states to compare information between them.
3. The right answer is latent prints.
Latent fingerprints are accidental fingerprints left by the skin on a surface, whether visible or invisible at the time of deposit.
Treatment techniques can visualize invisible latent print residues, whether from natural transpiration of the skin or from a contaminant in the blood.
4. The right answer is FACES.
The composite facial is a judicial investigation tool that represents the most likeable portrait possible of the face of a wanted person. It is established from testimonials.
5. The right answer is DNA profiling.
A genetic fingerprint, or genetic profile, is the result of a genetic analysis, making it possible to identify a person from a small amount of their biological tissues (hair bulb, blood, saliva, vaginal secretion, sperm).
6. The right answer is Criminal Investigative Analysis.
Criminal analysis is a method of analysis and investigation in the criminal field based on the use of new technologies (computer science). Criminal analysis distinguishes itself from behavioral analysis (criminal profiling).
Criminal analysis is a method that emerged in the US in the 1960s in the context of the fight against organized crime. This technique allows investigators to create links between elements (individuals, events, places, relationships ...), to structure and prioritize these elements (graphics, maps ...).
7. The right answer is Alec Jeffreys.
Sir Alec John Jeffreys (born January 9, 1950 in Luton, Bedfordshire) is a British geneticist who has developed genetic fingerprinting techniques.
8. The right answer is traditional.
DNA forensic analysis, commonly known as DNA analysis, is less than 10 years old. However, basic science dates back to at least 1953, when two young researchers from Cambridge University, James Watson and Francis Crick, discovered the molecular structure of DNA.
9. The right answer is the mtDNA database.
Unlike nuclear DNA, mitochondrial DNA does not contain repetitive sequences and inter-individual variations are sometimes visible on a single nucleotide. The polymorphism of the mitochondrial DNA is thus a polymorphism of structure (and not of repetition as that of the nuclear DNA).
Forensic analysis is performed on these polymorphisms present in a non-coding region called control region (also called D-loop). The two most variable portions of the control region (HV1 and HV2) are amplified by PCR and then detailed.
10. The right answer is revelancy test.
The revelation test allows to disclose something that was invisible or unnoticed before.
Answer:
The correct answer is chordata.
Explanation:
The Reptilia, Amphibia, Mammalia, and the Aves all come under the kingdom Animalia, and all are the part of the basal clade Chordata. This signifies that all these species during a certain point of their life exhibited a notochord. A notochord refers to a cartilaginous rod of skeleton that supports the body in all the embryonic and in some of the adult chordate animals.
The correct answer is B. beaks, finches
Explanation:
One of the main elements Darwin used to write "The Theory of Evolution by Natural Selection" was his observation of finches on the Galapagos island. Charles Darwin visited Galapagos during the 1830s and in there he observed multiple species of finches that differ in the shape of their beaks. This caught Darwin's attention who determined the shape of the beak varied according to the diet the species had. For Darwin, this shown all the finches derived from the same ancestor and their beaks and other features were the results of natural selection and evolution. Thus, Darwin wrote his theory by noting the differences in the beaks of closely related finches.