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JulijaS [17]
3 years ago
9

Genetic mutation which can lead to diversity between organisms can be caused by

Biology
1 answer:
Sergio039 [100]3 years ago
8 0

Answer:

DNA

Explanation:

Mutations are changes to an organisms DNA that creates diversity within a population by introducing new alleles. Some mutations are harmful and are quickly eliminated from the population by natural selection harmful mutations prevent organisms from reaching sexual maturity and reproducing.

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A woman at 26 weeks of gestation is being assessed to determine whether she is experiencing preterm labor. Which finding indicat
My name is Ann [436]

Answer:

<u>A. The cervix is effacing and dilated to 2 cm.</u>

Explanation:

<u>PRETERM LABOUR:</u>

<u>DEFINITION:</u>

Preterm labor is defined as labor or delivery that occurs before 37 weeks of gestation.

<u>DIAGNOSIS</u>

A pregnant patient is said to be undergoing preterm labor if:

  1. Regular Uterine contractions ( at least 1 in 10 minutes).
  2. Dilation of cervix up to 2 cm or greater and effacement of cervix up to 80%
  3. Patient experiences pelvic pressure, backache, vaginal discharge or bleeding
  4. Cervix is shortened up to less than 2.5 cm with funneling of internal os when examined by Transvaginal Ultrasound

Fetal Fibronectin is a glycoprotein that if found in vaginal secretion between 24 and 34 weeks of gestation is an <u>excellent predictor</u> of preterm labor and indicates that the patient is at high risk of undergoing of preterm labor.

Similarly, increased levels of maternal salivary estriol is a predictor of preterm labor.

Coming back to the answer choices,

<u>A. The cervix is effacing and dilated to 2 cm.</u>

This is the correct answer choice as effacement of cervix and dilation of cervix upto 2cm or greater is a diagnostic feature of preterm labor.

<u> B. Irregular, mild uterine contractions are occurring every 12 to 15 minutes.</u>

<u>Regular uterine contractions at least 1 in 10 minutes is diagnostic of preterm labor.</u> Therefore this is the incorrect answer choice. However, Uterine contractions equal to or greater than <u>4 per hour is a good predictor</u> that patient will undergo preterm labor.

<u>C. Fetal fibronectin is present in vaginal secretions. </u>

Presence of fetal fibronectin in vaginal secretions is an <u>excellent predictor</u> of preterm labor. Therefore, this answer choice is inappropriate.

<u> D. Estriol is not found in maternal saliva.</u>

<u>Elevated maternal salivary estriol is a predictor of preterm delivery. </u>Therefore, this answer choice is also incorrect.

3 0
3 years ago
How does human evolution or natural selection relate to the susceptibility of disease?
Vera_Pavlovna [14]
Human evolution and natural selection both greatly relate to the susceptibility of a disease. For every disease that passes through, there will likely be a small handful of people who happen to be immune.

For example, the Black Death was a plague that peaked in Europe around year 1350. This disease unfortunately killed hundreds of people, but there were the select few who were immune. Later, these people had children and passed the trait down. The trait has likely continued to be passed down to the point where a majority of the population is likely immune to this particular disease. 
This is an example of both human evolution and natural selection. Humans have evolved and passed this "immunity" trait down to children and grandchildren, and now it is unlikely that many people will be affected if this disease happens to pass through again. 
This is also an example of natural selection because the people who were susceptible to the disease likely caught it and passed away. These were the people who were not considered "fit" for the environment and the disease.

Human evolution and natural selection work with each other to evolve humanity and our susceptibility to disease. Unfortunately, it is beyond likely that new diseases will constantly arise and may harm humans. However, as we continue to evolve, we are much less likely to catch previous diseases. 
7 0
3 years ago
What is the primary function of the respiratory system?
shtirl [24]
The primary function of the respiratory system<span> is the exchange of oxygen, which is needed by the body's cells, for carbon dioxide, which is produced as a waste product of cellular metabolism.</span>
5 0
3 years ago
A plant has two organ systems: the shoot system and the root system.
alexandr1967 [171]
True.............................................................................................................................................................
7 0
4 years ago
Read 2 more answers
Make sure the answers to all four questions are correct. 100% correct answer. Thank you
Scorpion4ik [409]

Chicken, beef, pork, and egg are sources of protein from most efficient to least efficient.

option(a) and option(b) i.e, being an informed consumer and buying locally farmed produce supports sustainable agriculture.

overnutrition is consuming more calories than necessary. undernutrition is consuming less calories than necessary. malnutrition is not consuming enough food to gain specific nutrients needed to sustain life.

option ( a, b, e, f, i, and j ) are risks of using pesticides.

Large biomolecules and macromolecules known as proteins are made up of one or more extended chains of amino acid residues. It aids in cell regeneration and repair in your body.

Sustainable agriculture is the practice of farming in a way that satisfies society's current demands for food and textiles without endangering the ability of present or future generations to meet their own needs. It might be founded on knowledge of ecosystem services.

The biochemical and physiological process by which an organism uses food to sustain its life is known as nutrition. Consumption, absorption, assimilation, biosynthesis, catabolism, and excretion are all included. Nutritional science is the field of study that focuses on the physiological aspects of nutrition.

Pest control agents are compounds known as pesticides. Insecticide, nematicide, molluscicide, piscicide, avicide, rodenticide, bactericide, insecticide, animalized, microbicide, fungicide, and lampricide are some examples of these.

To know more about protein refer to:  brainly.com/question/17095120

#SPJ1

8 0
2 years ago
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