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3 years ago

Which structure supports and connects the cells of the nervous system?

1 answer:

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Neuroglia, which is sometimes referred to as "glia", are cells that are not neurons but merely support and provide protection for neurons. They are called 'non-neuronal cells' and they exist in the central nervous system (brain and spinal cord) and the peripheral nervous system (nerves outside the brain and the spinal chord).

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Has evolution by natural selection recently occurred in the worldwide populations of Mycobacterium tuberculosis?

Phoenix [80]

Answer:

Yes

Explanation:

Evolution by natural selection has recently occurred in the population of Mycobacterium tuberculosis worldwide which can be seen now because the number of antibiotic-resistant mycobacterium is increasing and becoming high than non-resistant mycobacterium.

So due to natural selection, the resistant bacteria is selected because only resistant bacteria is having those allele which help them to survive in the presence of antibiotic. Now mycobacterium is becoming multiple drug-resistant which is a great matter of concern for doctors. Therefore the given statement is true.

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3 years ago

A substance that influences the reaction but does not participate in the reaction is

Sedbober [7]

Answer:

a catalyst

Explanation:

Catalyst is a substance that influences the rate of reaction without being consumed in the reaction. They increase the rate of reaction by decreasing the activation energy of the reaction. In biological system, enzymes are referred to as biological catalyst or biocatalyst. They are generally protein in nature and are very specific for their substrate. They also increases the rate of biological reaction by forming enzyme-substrate complex.

hope this helps and have a good day :-)

3 0

4 years ago

What is a pH in biology?

USPshnik [31]

Answer:

pH is the measure of hydrogen ion concentration in a solution. It measures how acidic or how basic a solution is, on a scale of 0 to 14, where less than 7 is acidic, 7 is neutral, and greater than 7 is basic.

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3 years ago

Read 2 more answers

WILL GIVE BRAINLIEST!!!!!!!!!

Galina-37 [17]

Answer:

Mitochondria and chloroplasts likely evolved from engulfed bacteria that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic bacterium, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion. (nature.com)

Explanation:

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3 years ago

Read 2 more answers

Sexually transmitted infections (STIs) are a significant problem in the world. The symptoms described in the case thus far are f

lys-0071 [83]

Answer

(From top left to the bottom) Neisseria gonorrhoeae, Herpes Simplex virus, Human papillomavirus (HPV)

(From top right to the bottom) Theponema pallidum, Chlamydia trachomalis, Candida albicans

Explanation:

Neisseria gonorrhoeae: infected individuals may experience pain when urinating or during sexual intercourse. It may be accompanied by unusual discharge (white, creamy or green) from the vagina or penis .

Herpes Simplex virus: causes painful sores around the lips and genitals. These sores are contagious .

Human papillomavirus (HPV): a viral STI, it appears as warts on the male and female genitals when a person is infected. These look like a cluster of pimples

Theponema pallidum: also known as syphilis, it is characterized by painless sores around the mouth or genitals. The sores may later develop into rashes.

Chlamydia trachomalis: may not have any symptoms but if there are any, they include discharge from the vagina or penis .

Candida albicans: is a fungal infection that produces vaginal discharge that looks like cottage cheese .

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3 years ago