Check all of the following which could describe the first interaction of the acquired immune system to an infection. A. Binding to IgM B. Activation of complement proteins C. None of the above D. Binding to IgG E. Stimulation of T-cell by APC

Answers

Answer 1
Answer: E. Stimulation of T-cell by APC

The initial exposure of the body to an infectious agent e.g. through a vaccine, triggers an immune response most of which rapidly diminishes after the vaccination.  However some cells of the immune system called lymphocytes remain with a memory of that pathogen.As a result, if the same pathogen infects a vaccinated person, the memory cells remember and recognize it and rapidly spring into action triggering a much more rapid response specific to that pathogen than the initial exposure, effectively dealing and neutralizing the pathogen.

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Suppose you were a superhero that could fly up through the atmosphere while feeling the temperature and air pressure change around you.describe your trip

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If I'll be a Super hero and I'll be flying up through the atmosphere with this kind of temperature and air pressure that suddenly changes every now and then, well maybe it will be a fun trip yet a very challenging one. I need to feel the too much heat that is directly hitting my skin plus the sudden change of the weather

What is the impact of genetically modified corn on society and environment?

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Biodiversity Loss: The use of some GM crops can have negative impacts on non-target organisms and on soil and water ecosystems. For example, the expansion of GM herbicide-tolerant corn and soy, which are twinned with herbicides, has destroyed much of the habitat of the monarch butterfly in North America.

(04.02 MC)What evidence supports the law of conservation of energy?
Light energy is converted to chemical energy during photosynthesis.
O Oxygen is made from the breakdown of carbon dioxide during photosynthesis.
O Energy is absorbed by chlorophyll during photosynthesis.
The sun gives off light energy that is absorbed by plants.

Answers

Answer:

Light energy is converted to chemical energy during photosynthesis.

Explanation:

The first law of thermodynamics, which is the LAW OF CONSERVATION OF ENERGY, states that energy can neither be created nor destroyed but can only be changed from one form to another. This law explains that the energy that exists cannot be made or destroyed, it can only be transformed from one of Its form to another.

The biological process of photosynthesis illustrates this law. Photosynthesis is the synthesis of organic molecules from inorganic molecules using the energy from sunlight. Plants, via their Chlorophyll pigment capture the light energy from the sun and use it to produce their food in form of organic molecules/glucose. This glucose is a chemical compound that stores energy in its chemical bonds.

Hence, photosynthesis supports the law of conservation of energy by changing/converting light energy from sun into a chemical energy in food (glucose).

Which statement best describes the human immunodeficiency virus (HIV) that has been shown to cause AIDS in humans?

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Over the time, HIV or human immunodeficiency is a lentivirus under the retrovirus subgroup has been causing HIV infections and AIDS or acquired immunodeficiency syndrome in humans. This virus destroys the white blood cells or the CD4+ cells to be specific which is crucial in the human immune systems.

The person infected then is less equipped to fight infections or diseases which will then develop into AIDS.

Which structures carry out life functions within cells?

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The specialized features of a cell that carry out cell functions are collectively called organelles. Examples of organelles include the nucleus, ribosomes, mitochodrion and golgi aparatus. 

Final answer:

The structures carrying out life functions within cells include organelles such as the mitochondria, peroxisomes, a cytoskeleton composed of microfilaments, intermediate filaments, and microtubules, the nucleus, and components of the endomembrane system.

Explanation:

The structures that carry out life functions within cells are often referred to as organelles. Among them, we find the mitochondria and peroxisomes which are essential for the cell's energy and detoxification processes. Mitochondria, through biochemical reactions, transform energy-carrying molecules into ATP - the cell's primary form of energy. Peroxisomes, on the other hand, detoxify harmful substances into harmless ones.

Moreover, cells possess a supportive framework, referred to as the cytoskeleton, made up of microfilaments, intermediate filaments, and microtubules. These all play unique functions, including providing a track for material transport within the cell.

In addition to these, the nucleus serves as the cell's command center, housing its DNA and controlling all cell functions. Last, but not least, we encounter the endomembrane system (including the ER and Golgi apparatus) and the cytoplasm - all essential for the cell's protein synthesis and transportation, and maintaining the cell's health and activity.

Learn more about Cell Organelles here:

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In 1953, who developed the model that is shown below?

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There is no attached model, but the greatest discovery in biology in 1953 could be only the discovery of DNA double helix. Watson and Crick discovered the chemical structure of DNA molecule. They showed that the molecule is looked like twisted ladders, and described it as a double helix. Their discovery was the great basis for a development of modern molecular biology.


Answer:

A: James Watson and Francis Crick

Explanation: