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Alisiya [41]
3 years ago
6

Which are the youngest fossils and in what type do they occur?​

Biology
1 answer:
anzhelika [568]3 years ago
5 0

Answer:

The Crainum fossils are the youngest fossils from 134 million years ago. The occur in the top layer of the earth's crust (rock)

Explanation:

Hope this helps :)

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What happens to the size in each level in the idealized pyramid as energy is transferred through the trophic levels?
Fed [463]

Answer:

The size is reduced as 80-95% of the available energy at one trophic level is not transferred to the next

Explanation:

There is loss of energy as it is transferred between trophic levels. The decrease in energy as it moves up the pyramid is due to energy loss as metabolic heat when one organism is consumed by another from the next level as it moves up the trophic levels.

4 0
4 years ago
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
HELP!!!!!!
goldfiish [28.3K]

theres no question or picture sorry

4 0
3 years ago
Around the world, people often die from waterborne diseases caused by bacteria and viruses. What is a likely reason for this sit
dimaraw [331]

Answer:

People drink water that has been contaminated by animal feces

Explanation:

7 0
3 years ago
What DNA strand would be complementary to a strand that has the<br>bases as such: AGTCGCAGG?*​
ss7ja [257]

Answer:

TCAGCGTCC

A - T, C - G

6 0
3 years ago
Read 2 more answers
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