BIOLOGY HIGH SCHOOL

During an annual check-up, the doctor typically feels the lymph nodes for swelling. What would swelling in the lymph nodes most likely indicate? A. White blood cells are lacking nutrients b. The body is experiencing an infection c. The body is not receiving enough oxygen d. White blood cells are growing uncontrollably

Answers

Answer 1
Answer:

Answer

Swelling of the lymph nodes mostly indicates the body is experiencing an infection.

Explanation

The swelling of lymph nodes can mean exposure to viruses and bacteria. Infections can result into swollen lymph nodes a condition called Lymphadenitis.  Cancer can also cause lymph nodes to swell. Lymph nodes act as filters which trap viruses and bacteria preventing them from spreading the infection to other parts of our body.


Answer 2
Answer: B. The body is experiencing an infection

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MIDDLE SCHOOL

Stem cells are undifferentiated cells that have the ability to continue to grow and divide in their nonspecialized state for long periods of time (eg., months or years)
Although the genes found within stem cells are the same, stem cells differentiate into unique cell types (eg, muscle cells, nerve
cells, etc.) due to
А.
different patterns in their gene expression
mutations in their genetic code.
meiotic division and fertilization
D.
random segregation and proliferation
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Answers

Answer:

A

Explanation:

All somatic cells are genetically identical. For differentiation to occur, appropriate molecular signals like growth factors stimulate stem cells to silence certain genes and express certain genes. Due to different sets of genes expressed, a cell now becomes a differentiated cell that is functional.

Hence, due to different patterns of gene expression, a cell is specialised.

MIDDLE SCHOOL

wich statement about chromosomes are true? a.)they are made during meiosis. b.) they are made of lipids and carbohydrates c.) they arr made of dna wrapped around proteins d.) they are not involved in mitosi

Answers

C) They are made of DNA wrapped around proteins
MIDDLE SCHOOL

What conclusions can you make about the relationship between temperature and pressure 45 pts for answer

Answers

Answer:

Under constant volume in a closed system the relationship between temperature and pressure is directly proportional.

Explanation:

As the pressure increases in the system the temperature also increases in the same order. It is explained in the Gay-Lussac's Law, also known as pressure-temperature law. If a gas is compressed i.e.

The pressure is reduced inside a container (constant volume) then the temperature inside the container is increased, it is practical demonstration of the pressure-temperature law. This mechanism is also used in refrigerators.

HIGH SCHOOL

What is the reason behind the high surface tension of water

Answers

The polarity of the water molecule helps it to cohere to nearby water molecules, forming a skin over it.
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