BIOLOGY HIGH SCHOOL

What is the main function of the large intestine?A. digestion of proteins
B. absorption of nutrients
C. breaking down complex carbohydrates
D. removing water from undigested waste

Answers

Answer 1
Answer:

The main function of the large intestine is to remove water from undigested waste. Therefore, the correct answer is option d.

The large intestine, also known as the colon, plays a crucial role in the final stages of the digestive process. Its primary functions include:

  • Absorption of Water: One of the key functions of the large intestine is to absorb water from the remaining undigested food materials (chyme) that enter it from the small intestine. As chyme moves through the large intestine, water is progressively absorbed, which results in the formation of more solid feces.
  • Formation of Feces: As water is absorbed, the contents of the chyme become more concentrated and solidified in the large intestine. This process transforms the liquid chyme into feces, which is then stored in the colon until it is ready to be eliminated from the body.
  • Storage and Concentration: The large intestine also serves as a storage organ for fecal matter, allowing the body to control the timing of bowel movements. It concentrates and compacts the waste material.
  • Microbial Fermentation: The large intestine is home to a diverse population of beneficial bacteria known as the gut microbiota. These bacteria assist in the final stages of digestion by fermenting certain indigestible carbohydrates and producing some vitamins and gases.

The large intestine does not play a significant role in the digestion of proteins, absorption of nutrients (the majority of nutrient absorption occurs in the small intestine), or the breakdown of complex carbohydrates (most carbohydrate digestion occurs in the small intestine as well). Its primary functions are related to water absorption, feces formation, and the maintenance of a healthy gut microbiota.

Therefore, the correct answer is option d.

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Answer 2
Answer:

The answer is D What is the main function of digestion?

:)

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What changes can occur in an aquatic ecosystem as a result of nutrient loading?

Answers

Yes, definitely algal bloom is a significant change. What is more important is how the bloom affects other aquatic life. The bloom forms a dense "blanket" of growth, which as it grows rapidly and dies, decomposes. Bacteria feed on this rich organic stuff and use up the dissolved oxygen in the water. As the oxygen levels drop, fish and aquatic insects die. This is the result of the algal bloom.

Answer:

Yes

Explanation:

definitely algal bloom is a significant change. What is more important is how the bloom affects other aquatic life. The bloom forms a dense "blanket" of growth, which as it grows rapidly and dies, decomposes. Bacteria feed on this rich organic stuff and use up the dissolved oxygen in the water. As the oxygen levels drop, fish and aquatic insects die. This is the result of the algal bloom.

Which best explains why this paperclip stays afloat on top of the water? the paperclip is less dense than water. the paperclip has less mass than water. the water has high viscosity. the water has surface tension.

Answers

The water has surface tension. Since the water towards the surface doesn't have as much weight being pushed downward on it as the water on the bottom, the water molecules push in three directions. up, left, and right. The molecules moving left and right keep an equilibrium on the surface. The molecules pushing up, creates a strong enough force to keep the paperclip floating.

Answer:

The water has high water tension

During meiosis, homologous chromosomes frequently exchange portions of their DNA. This process increases the number of different genotypes that an offspring can inherit. What is the name of this process?

Answers

Ans.

The process that involves exchange of genetic material between homologous chromosomes, is known as crossing over.  It occurs during meiosis I (between prophase I and metaphase I).

Crossing over is responsible for the variation in organisms as it makes new genetic combinations in the offspring that are absent in either parents and thus, contribute to genetic diversity.

Thus, the correct answer is 'crossing over.'
The answer is crossing over.

What are convection currents

Answers

Answer:

Convection is the transfer of heat due to the bulk movement of molecules within fluids, including molten rock.

Explanation:
(a current in a fluid that results from convection.)

Convection currents transfer heat from one place to another by mass motion of a fluid such as water, air or molten rock. The heat transfer function of convection currents drives the earth’s ocean currents, atmospheric weather and geology. Convection is different from conduction, which is a transfer of heat between substances in direct contact with each other.

Describe how a person can count the rate if beating of the left ventricle.

Answers

To count the rate of beating. For instance, if the heartbeat is 70 beats per minute and the stroke volume is 70 cm 3, the cardiac output is 70 70 cm 3 per minute, or 4900 cm 3 per minute.

What is the left ventricle?

The heart's left ventricle is the chamber that pumps blood to all the arteries. The left ventricle is the name for the lower left chamber of the heart. The heart's left ventricle serves as its primary pumping chamber. Left ventricular hypertrophy can cause stiffening of the thicker heart wall.

Because the pressure at which this chamber pumps blood is the same as that in all arteries, you can compute beating by measuring the pulse in the radial artery in your wrist. This artery is easier to discover beating because it is closer to the surface.

Therefore, to count the rate of the beating of the left ventricle, cover SV with your finger, and you are left with CO/HR.

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what is left ventricle:
it is the chamber of heart that supplies blood to all arteries...
how to calculate beating:
you can find it by calculating pulse in radial artery in your wrist...
reason:
the pressure with which this chamber pumps blood is the same that is in all arteries so the artery in your wrist is easy to find beating because it is nearer to the skin...

2. Choose a spot of soil that is nearby your home, school, or another area you frequent. If a crime were committed there, what types of materials do you think you'd find in your investigation of the soil? Do you think you would find materials that would be considered individual characteristics?

Answers

It depends on the nature of the crime. There could be foot marks there, or a certain of material found that is usually not found. There could be blood stains, or some genetic samples that could provide for DNA testing. There could be certain chemicals that could lead to identification of the substance used in the crime.

Answer:

You could find any number of things...shoe prints and maybe some tire marks.  You might find shell casings, blood, broken glass, dropped items, etc.  Some of these could be individual characteristics like the shoe prints, blood, or tire marks.
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