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katen-ka-za [31]
3 years ago
10

I NEED HELP RN!! PLEASE

Biology
1 answer:
Svetradugi [14.3K]3 years ago
6 0

Answer:

c got it right on my quiz

Explanation:

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13. What information about a population is given by an age distribution?
Hoochie [10]

Answer:

Option 2

Explanation:

The information given by an age distribution about a population is the <u>number of individuals within each age range</u>.

3 0
2 years ago
Deer eat grass. What term describes the ecological relationship between deer and grass?
CaHeK987 [17]
The deer eat grass. Its droppings, which eventually decompose into the ground, provide minerals and vitamins to the plant roots. This food is vital for it so the plant remains alive and can produce oxygen which is essential for the deer and grass is also a food source for him too.
8 0
3 years ago
Read 2 more answers
What is the single most critical defense system of your body? 2. how do mucous membranes provide protection from invading organi
eduard

Answer 1:  

              The most critical defense system of our body is known as immune system.  

Discovery

            More than 2000 years ago, the Greek historian Thucydides observed that occasionally some-one contact a disease, recovers and never catches the disease again, the person has become immune to the subsequent infection. In 1796 an English country doctor Edward Jenner hypothesized that cowpox somehow conferred protection against smallpox.  

Components of immune system

                 Immune system is composed of three line of defense, these are:  

1. First line of defense  

                 It is non-specific defense and consist of skin, mucus and cilia.  

2. Second line of defense  

               It is also non-specific defense includes macrophages, neutrophils, natural killer cells and complement system etc.  

3. Third line of defense

            It is specific defense and accomplished by B-cells and T-cells though cell mediated immunity and humoral mediated immunity.  


Answer 2.  

First line of defense include mucus membrane and skin. It is non-specific defense. it provide protection through the following ways:

Role of mucus membrane

1. Mucus membrane cover the digestive and respiratory tract and acts as a barrier to microbial invasion.  

2. Mucus membrane line the inside of the nose to trap particles before they enter the body.  

3. Mucus add moisture to each breath to prevent he airways and lungs from becoming dry and damaged. As air passes through the nasal cavity, moisture is transferred from the mucus secreted by the lining of the nasal cavity into the air.  

4. Inside lungs a thin coat of mucus membrane is present inside alveoli which catches the dust and bacteria and swept them towards wind pipe through beating of cilia.  


Answer 3:

Definition

               The ability to resist damage from foreign substances such as microorganisms and harmful chemicals is known as immunity.  

Explanation

           Immunology is the study of immunity and the defense mechanism of the body. Immunity is one of the most important job provided to body in a number of ways, like in the form of anti-bodies, WBC, interferons etc.

Types of immunity

            Immunity may be active or passive both types are achieved naturally or artificially.  

Download file for remaining seven answers.

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4 0
3 years ago
1. Fingerprints may be resolved into three large, general groups of patterns: the arch, the loop, and the ____.
LenKa [72]

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.

4 0
4 years ago
The stomata open and close in response to pressure within
LuckyWell [14K]
They open in response to pressure within the guard cells.
8 0
4 years ago
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