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Delicious77 [7]
3 years ago
9

What is the difference between primary and secondary succession?

Biology
2 answers:
mote1985 [20]3 years ago
7 0
P is more important your welcome
Travka [436]3 years ago
3 0
Primary succession occurs at places where there was no vegetation or life before, usually places such as lava or places where glaciers were. Secondary occurs at places that have already previously been colonized, but the habitat was somehow disturbed or damaged.
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Describe the general types of diagnostic tests used to diagnose patients infected with HIV.
GenaCL600 [577]

AIDS

This disease leads to death by weakening the immune system of the human body.  Common symptoms are related to the nervous system like dementia, anxiety, depression and insomnia.

TESTS

The tests for AIDS are discussed below.

The most common test for any disease is the blood test.  

When human body is infected with the virus, the body produces anti-bodies to combat this infection. The blood test is positive if these anti-bodies are present in the blood sample of the infection person. However, it takes time for these anti-bodies to appear in the blood stream, hence, blood test should be done at regular intervals.

The tests specifically developed for AIDS are as follow.

ELISA or Enzyme-linked immunosorbent assay

If this test is positive, this is followed by a Western Blot test. The blot test is done in order to confirm the disease.

As said before, anti bodies take time to develop. If the test is done during this phase, it will be negative despite of the presence of virus in the blood stream.

HOME

Only one home test is approved. This is called Home Access Express Test. The kit of this home test is available at pharmacies.

SALIVA

The saliva from the patient’s cheek is obtained on a cotton pad. This pad is put in a vial which is then sent to the lab for testing.  If the result is positive, blood test is done to confirm the disease.

VIRAL LOAD

As the name suggests, this test measures the quantity of virus present in the blood. This test is done to either test the presence of HIV or to track the progress of the treatment of HIV.

WESTERN BLOT

This test is done when the result of ELSA test is positive. This test confirms the disease.

All the above test if turn out negative and the patient still doesn’t recovers, this testing should be done periodically until the disease is confirmed.

6 0
3 years ago
What happens to a comet when it gets close to the sun? Explain the two tails
juin [17]
When it gets to the it grows warmer and some of the ices heat up and become gas (sublimating), relaying the dust grains that were trapped in the ice. The dusty gas coming from the nucleus is heated by the sun and for,a a glowing hit cloud around the comment called coma.
Hope this help and be safe
4 0
3 years ago
Which of these statements best compares gravitational and electromagnetic forces in the solar system? (2 points) Electromagnetic
Soloha48 [4]
Gravitational is only attracted and electromagnetic is both atrractive and repulsive since it depends what you are talking about
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3 years ago
What is happening at the cellular level during a muscle cramp
anygoal [31]

Muscle contraction occurs when the brain tells the body to move. The brain ... Muscle cramps are primarily caused by a lack of ATP in the body. ... The function of potassium inside the muscle cell is to repolarize the membrane.

6 0
3 years ago
Suppose you add fluorescent ribonucleotides to a cell undergoing dna replication so that the rna primers used in dna synthesis g
Lady_Fox [76]
Answer: The lagging strand glows more because its RNA primer is nearer the replication fork.
During DNA replication process, both the strands of DNA are replicated simultaneously in opposite direction. One strand is replicated continuously and known as leading strand while the other strand is replicated discontinuously and known as lagging strand.  The leading strand has only one primer attached to it while the lagging strand


4 0
3 years ago
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