Help Please ~ 20 points

Which of the statements regarding the nitrogen cycle is true?

Question 20 options:

Nitrogen fixation is the process where atmospheric nitrogen is converted by bacteria into biologically usable forms


Atmospheric nitrogen is absorbed through the leaves of plants


Denitrification occurs when a nitrogen containing compound is produced from nitrogen in the soil


Animals obtain nitrogen through the process of cellular respiration

During the first trimester of pregnancy.

Answer: cartilaginous

Explanation:

synarthrosis – There is  little or no mobility. Most synarthrosis joints are fibrous joints (e.g., skull sutures).

amphiarthrosis – allows joints to have slight mobility.

diarthrosis – freely movable joints.

cartilagnious is cartilage type of strong stretchy tissue found in the joints.

The correct answer is: B) G1

Normal cells (unlike cancer cells), move through the cell cycle in a regulated way in order to make sure that cells don't divide under conditions that are unfavorable for them. Information about their own internal state (nutrients, signal molecules, DNA integrity) is signal to go or not to go through the cell division. Because of that there are few checkpoints in the cell cycle at which the cell examines the signals and makes a “decision”. The major checkpoints are:

• The G1- the first point at which it must choose, once it passes the G1 checkpoint the cell enters S phase

• The G2-the cell checks DNA integrity and checks if replication is done well.

• The spindle checkpoint-at the transition from metaphase to anaphase.

Final answer:

The cell first commits to continue the cell cycle through the M phase after the G₁ checkpoint, where it assesses various conditions favorable for division; hence the correct answer is B) G₁.

Explanation:

The cell is first committed to continue the cell cycle through M phase after the G₁ checkpoint. This checkpoint, also known as the restriction point, determines whether all conditions are favorable for cell division, including adequate reserves, cell size, and DNA integrity. If these conditions are met, the cell commits to the cell division process and passes into the S phase. While the G₂ phase involves a checkpoint to ensure DNA replication was successful and the cell has enough materials for mitosis, the first commitment to proceed with cell division is at the G₁ checkpoint. Therefore, the correct answer to the question is B) G₁.

the answer is d., because the pancreas supplies insulin that helps to digest carbs, small intestine is where the digested food goes 2 the bloodstream to deliver cells nutrients they need to function..

Most digestive enzymes are synthesized by the pancreas and small intestine.

The correct option is D.

Digestive enzymes are a group of enzymes that break down the macromolecules into smaller molecules.

So, these help in the process of digestion.

The enzymes are:

Amylase - break down the carbohydrates

Protease -break down the proteins

Lipase - Break down the fats.

Thus, the correct option is (d) the pancreas and small intestine.

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Extra NITROGEN can be leaking into the atmosphere through the NITROGEN cycle. The nitrogen is the most in the air at the moment so the nitrogen cycle takes the nitrogen round and it's leaked back out in different forms

The extra amount of nitrogen get back into the ecosystem by the combustion of fossil fuels and the use of nitrogen-containing fertilizers in the agriculture of crops.

The nitrogen cycle moves nitrogen element back and forth between the atmosphere and the living organisms. Bacteria are responsible for the change of nitrogen gas from the atmosphere to the different nitrogen compounds such as ammonia, nitrate, nitrite which the roots of plant can absorb. Other bacteria which can change nitrogen compounds back to nitrogen gas, helps this gas to re-enter the atmosphere.

In general, human activities release nitrogen into the environment by the two main processes which are combustion of fossil fuels and the use of nitrogen-containing fertilizers in agriculture. Both of these processes increases the level of nitrogen-containing compounds in the atmosphere.

Learn more about Nitrogen cycle here:

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The first number (120) is the systolic blood pressure. This is the pressure reading once the heart pumps, send a large volume of blood coursing through the artery and causing there to be more pressure in the artery at that moment.

The second number (80) is the diastolic pressure. This is the pressure reading after the heart has pumped and is refilling with blood. The diastolic reading is lower than the systolic reading because there is a lower volume of blood flowing through the artery after that initial pump from the heart, and therefore there is less pressure in the artery.

***see attached pic***

Answer:

The systolic pressure is 120, and the diastolic pressure is 80.

Explanation:

edge 2021. unit test review

Albedo is the measurement of a surfaces ability to diffuse and reflect oncoming radiation, scores range from 0 ( an ideal blackbody that absorbs any and all incident radiation) to 1 ( an ideal white body that completely diffuses and reflects all incident radiation). A simple way to think about this concept is in the terms of sunlight, a black or darkly colored surface will always absorb much more of the heat (radiation) than a white or lighter colored one, for the lighter objects reflect the sun's energy much easier.

Answer:

This effect is nothing other than the reflection of solar radiation when it affects the planet. Light surfaces have more albedo reflecting most of the radiation and dark surfaces less albedo since they absorb radiation.

Explanation:

The albedo of all these combined surfaces is called the planetary albedo. The planetary albedo of the earth is approximately 0.31. That means that about one third of the solar energy that reaches the earth is reflected back into space and only about two thirds is absorbed. The albedo of the moon is 0.07, which means that only 7% of the energy that reaches it is reflected. The albedo of distant planets, so distant that they are difficult to study with telescopes, could be very helpful for scientists trying to determine what a planet is made of.

This effect is much greater the clearer the surface; for example, on snow or ice surfaces, up to 90% of the incident radiation can be reflected and therefore the UV rays would bounce continuously between the snow and the atmosphere. This effect is therefore a source for example of the thaw after glacial times, where with so much white surface the world temperature overheats and the glacier season ends.

The albedo effect is very significant for the human being, and more now when many of the defenders of the theory of global warming, come to their reasoning to explain how if the poles melt and there are less and less glaciers the earth by natural order is It will start to reheat faster.

Answer:

Because steroid hormones bind to the intracellular receptors and can regulate gene expression (turn the genes on or off).

Explanation:

The receptors located in the nucleus are called intracellular receptor (unlike transmembrane receptor which is located on the membrane). Usually, the ligands of intracellular receptors are small, hydrophobic molecules, since they must pass through the plasma membrane to get to their receptors. For example, hydrophobic steroid hormones, such as estrogen or testosterone are ligands for intracellular receptors.  

Intracellular receptors have DNA-binding activity, meaning they can attach to specific sequences of DNA and regulate its gene expression (e.g. transcription).

So, it takes time for them to perform their function.

Steroid hormones act slowly due to their water-insoluble nature, their method of transport via the bloodstream bound to transport proteins, and their intracellular action which involves regulating specific genes to affect protein synthesis.

The primary reason steroid hormones usually act slowly is due to their hydrophobic (water-insoluble) nature, like cholesterol, and their mode of transport. These hormones must travel to their target cell bound to a transport protein via the bloodstream, a process which can be relatively slow. Additionally, steroid hormones have a longer half-life as compared to hormones derived from amino acids. For instance, cortisol, a lipid-derived hormone, has a half-life of about 60 to 90 minutes. This is much longer than the half-life of epinephrine, an amino acid derived-hormone, which is about one minute.

Steroid hormones also diffuse across the membrane of the target cell and bind to intracellular receptors, rather than extracellular receptors, which is another reason why their action typically seems slower. This binding triggers a cell signaling pathway that regulates specific genes, leading to changes in protein synthesis and thus alters the cell processes.

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Answer:

The answer is D

Explanation:

I just took the test. I got it wrong when I did C and it said the correct answer was D. :/

Answer:

The answer is D

Explanation:

Because I said so

for me i think its c

The answer to your question: cause of death.

Answer: Cause of death.

Explanation: The autopsy can be done in order to know the main cause of the death.

Autopsy can be used to know to reason behind the death of the person. This technique uses various kinds of principles and methodologies to known the exact cause of the death of the person.

This can be used for evaluating the suspect's alibi.

The answer is False

I hope this helps

The correct answer is: inhibition of reverse transcriptase

Reverse transcriptase is an enzyme with the ability to produce DNA (complementary DNA-cDNA) form the RNA template. Retroviruses, such as HIV virus after entering the cell, liberates the single-stranded RNA genome from the attached viral proteins and copies it into a cDNA molecule, That cDNA is than incorporated into host’s genome (via an enzyme integrase).

Antriretroviral medications such as AZT are inhibitors of reverse transcriptase, they decrease replication of the virus but not affecting the host.

the 4 major categories of tissue are: muscle, epithelial, connective, and nervous.

blood is not a tissue.

The four major categories of tissue include muscle, epithelial, connective, and nervous tissue. Blood is not categorized as a tissue per say, but is often considered a specialized type of connective tissue, specifically, blood or vascular tissue.

The four major categories of tissue in the human body are muscle, epithelial, connective, and nervous tissue. Muscle tissue is responsible for movement in the body; epithelial tissue serves protective, sensory, and secretory purposes; connective tissue supports binds, and protects other tissues and organs; and nervous tissue is involved in receiving stimuli and transmitting signals.

Blood, on the other hand, while an important component of the body, is not categorized as a tissue. It's often considered a specialized type of connective tissue, but it falls under a subset, of blood, or vascular tissue. So, among your options, blood is NOT one of the four major categories of tissue.

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Colpidium colpoda is in contact with the environment due to its membrane containing receptor, once it detects the presence of a bacterium able to be phagocyted by the cell, it will go towards it by the cilia there will have membrane invagination due to the contraction of the cytoskeleton (actin-myosin) with the presence of ATP generated by mitochondria, and a stimulation of the secretion of enzymes to degrade the ingenous bacterium (RNA synthesis by the nucleus and translation by ribosomes).

Dna is copied in a cell before a cell divides. Two nucleotide strands of original double helix separate along the strands. ... They move along the DNA molecule breaking the hydrogen bonds between the complementary nitrogen bases. Replication fork- y shaped region that results when two strands separate.

After DNA replication, the two original DNA strands each become part of separate identical DNA molecules, due to semiconservative replication. They retain their original sequence and are segregated into two daughter cells.

During DNA replication, the two original strands of a DNA molecule serve as templates for the creation of two new complementary strands. This process ensures that each of the resulting daughter DNA molecules consists of one old (parental) strand and one newly synthesized strand, a method known as semiconservative replication. Thus, after DNA has replicated, the two original strands become part of two separate, but identical,

DNA molecules. Each double helix has the same sequence as the original, and they are divided equally into the two daughter cells during cell division. The accurate replication of DNA is crucial for maintaining the genetic integrity of living organisms

physical

hope this helps :)

Answer:

Thermal conductivity is a physical property

Explanation:

Physical property is a term linked to matter and is characterized as the private property of a body. This particular property can be measured and observed, as long as it does not compromise the composition of this body, that is, it does not compromise the matter.

Thermal conductivity is a physical property, as well as mass, color, melting and boiling point, among others.

the answer is muscularis externa

Final answer:

The muscularis externa is the layer of the digestive tract that contains the effectors for digestive propulsion.

Explanation:

The layer of the digestive tract that contains the effectors for digestive propulsion is the muscularis externa. The muscularis externa is the third layer of the alimentary canal and is responsible for the contractions that promote mechanical digestion, expose food to digestive chemicals, and move the food along the canal. It consists of smooth muscle layers, including an inner circular layer and an outer longitudinal layer.

Answer:

The correct answer is B a decrease in biodiversity.

Explanation:

Cutting down a rainforest has nothing to do with erosion so A is not correct. Cutting down a rainforest will not increase recycled energy so C is also wrong. Lastly a rainforest will have more photosynthesis being performed than agricultural crops. So D is ruled out. This leaves B because rainforests are filled with biodiversity and cutting one down would lead to a decrease in it.

Cutting down a rainforest generally results in a decrease in biodiversity and overall photosynthesis, and an increase in erosion. The dense vegetation and unique ecosystem of the rainforest play significant roles in nutrient cycling and energy flow, which are disrupted when replaced with agricultural crops.

Cutting down a rainforest for agricultural activities like planting coffee plants mostly results in a decrease in biodiversity. Rainforests are home to many unique species of plants and animals, many of which are unable to survive in other habitats. When the rainforest is removed, these species lose their habitat and may become extinct, resulting in decreased biodiversity.

In terms of results on erosion, rainforest removal often causes an increase in erosion. The complex root systems of rainforest trees help to hold the soil in place. When these trees are removed for farming, the soil is more exposed and can be washed away by rain.

On the matters of energy recycling and photosynthesis, the cutting down of rainforests generally leads to a decrease in both. The dense vegetation of the rainforests plays a crucial role in the nutrient cycling and energy flow within the ecosystem. In addition, because rainforest trees perform photosynthesis at a much larger scale than crops, replacing them with agricultural plants actually reduces the overall rate of photosynthesis.

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seminiferous tubules

The answer is solvent. Water is a universal solvent

I am not sure if I canyyhhhhhhj

c) lignin

Bacterial cell walls are made of peptidoglycan (also called murein), which is made from polysaccharide chains cross-linked by unusual peptides containing D-amino acids. Bacterial cell walls are different from the cell walls of plants and fungi which are made of cellulose and chitin, respectively.

Sled dogs have counter current circulation – which means that the cool blood from the feet gets reheated before getting back to the body core.

This is true.

When warm blood arrives in the paws of these dogs through the arteries, the heat is transferred to the venules, ensuring that the blood has been warmed up before it returns to the rest of the body.

The correct statements are:

•An NLS can be a monopartite or bipartite signal which includes a significant number of basic amino acids.

• The recycling of importins back to their original conformation requires GTP hydrolysis in the cytoplasm.

The other answers are incorrect because GTP is not required for an importin to bind to an NLS but for the release of importin and an NES or nuclear export signal  is the sequence  in a protein for export from the cell nucleus to the cytoplasm, not to the nucleolus.

Answer:

the flow of energy in an ecosystem  

the eating patterns of organisms  

how much energy is transferred from one organism to another

Explanation:

A food web is an interconnection of multiple food chains and a practical representation of what-eats-what in an ecosystem, while a food chain is a linear sequence of how nutrients and energy (in the form of food) are transferred from one organism to another organism in an ecosystem. A food web contains many interconnected food chains. A food web or food chain provides information about how organisms are connected, the eating patterns of organisms, and the flow (or the amount) of energy that is transferred from one level to another through different organisms in an ecosystem.

Answer:

Increase

Explanation:

Cellular respiration ‘burns glucose for energy as shown in the equation below;

C₆H₁₂O₆ + 6O₂ --> 6CO₂ + 6H₂O + 36 or 38 ATP

One of the end product of this process if carbon dioxide. The carbon dioxide is expelled into the environment.