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siniylev [52]
3 years ago
11

Legumes are plants that produce _____.

Biology
2 answers:
denis-greek [22]3 years ago
5 0

Answer:

The answer is <em>Nitrogen</em>

ExtremeBDS [4]3 years ago
3 0

Answer:

Nitrogen

Explanation:

Legume roots produce their own nitrogen, which is a major fertilizer nutrient needed by all plants for growth. Nitrogen is produced in nodules that form on the roots of legumes, which contain Rhizobium bacteria. The bacteria take nitrogen from the air and convert it into a form the plants can use.

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The scientists who are researching the effectiveness of the HPV vaccine will test their hypothesis by separating 2,392 young wom
Delicious77 [7]

Answer:

C

Explanation:

<em>The correct answer would be the group that was given a placebo.</em>

A control group in an experimental study is the group that is subjected to all other conditions except the variable whose effects are being determined during the course of the experiment.

<u>Since the main goal of the research is to evaluate the effectiveness of the HPV vaccine, the difference between the experimental and the control group would be the vaccine.</u> Instead, the control group would be given a placebo - a substance that is designed not to have any effect but looks like the vaccine itself.

<em>Correct option: </em><em>C</em>

6 0
3 years ago
What is not true of lymph and the lymphatic system?
tia_tia [17]

According to the question, what is not true of lymph and the lymphatic system is the fact that they are found in the intercellular fluid.

The lymphatic or lymph system involves an extensive network of vessels that passes through almost all our tissues to allow for the movement of a fluid called lymph. Lymph circulates through the body in a similar way to blood.

3 0
3 years ago
It is estimated that every year more than 15 million babies are born too early. The lungs of these premature infants are often i
Triss [41]

Answer:

The development of artificial placentas can be a solution that would allow the survival of premature babies, favoring the complete development of the organs -such as the lungs- that would allow their viability.

Explanation:

The main problem facing a premature newborn - before 30 weeks of gestation - is his inability to breathe, due to an immature respiratory system.

During pregnancy, the mother provides nutrients and oxygen to the fetus through the placenta and the umbilical cord, which in turn receives carbon dioxide and waste products that eliminates the future baby. At birth, the baby should be able to breathe and nourish itself.

Some circumstances can cause premature birth, with the consequences of a fragile baby who may not be able to breathe due to the immaturity of his lungs.

<h3>Question 1: State how an artificial placenta would be of benefit to the lungs of premature infants. </h3>

In the case of a newborn whose lungs are not suitable for breathing, an artificial placenta provides conditions similar to the maternal uterus that allow the complete development of the respiratory system, that is, the formation of the bronchial tubes, bronchioles, pulmonary alveoli, as well as the production of surfactant, a substance that prevents alveolar collapse during breathing.

Knowing that a premature baby cannot return to the mother's womb, it is proposed to extend the period of development by introducing the newborn in a device that simulates the conditions of the uterus and the placenta.

<h3>Question 2: Explain why the lambs’ blood must be filtered as it circulates through the artificial placenta. </h3>

In the artificial placenta, also called biobag, the umbilical cord of the lambs is connected to a gas exchange machine - similar to that of extracorporeal circulation - capable of providing blood, nutrients and oxygen, in addition to eliminating waste products and dioxide carbon

The liquid contained in the biobag has a composition similar to that of the amniotic fluid and provides nutrients to the lamb. External monitors connected to the lamb provide all the necessary information about the vital signs of the developing animal.

<h3>Question 3: State one reason why premature lambs were likely used as model organisms in this study rather than mice.</h3>

Lambs have been chosen as a model to perform studies of artificial placenta because their fetal development is very similar to that of humans although their maximum gestation time is shorter.

In lambs, full gestation lasts up to 22 weeks, and lung development occurs between weeks 15 and 17, while in the human fetus it occurs between weeks 21 and 26. However, the stages of development are quite similar.

Since so far only the use of artificial placentas has been achieved for a maximum of 30 days, the relative rapidity with which lung development occurs in lamb fetuses allows its study, and the results of tests in lambs can be extrapolated to the fetus Human in the future.

Learn more:

Authorization for animal research brainly.com/question/8226295

8 0
3 years ago
An object from space burning up as it enters the atmosphere of a planet
Elina [12.6K]
Did you try asteroid?
7 0
3 years ago
Read 2 more answers
As you observe an unknown cell under a microscope, you make the following observations:
DedPeter [7]

Answer: it is probably a plant cell because it has a cell wall and chloroplasts.

8 0
3 years ago
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