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wel
3 years ago
5

Which of the following correctly describes the relationship between speed and velocity?

Biology
1 answer:
nadya68 [22]3 years ago
4 0
Velocity is in relation to direction it is the speed plus direction it's going, and speed is distance over time
it should be the second one
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Which statements explain reasons why unconformities occur? Check all that apply.
likoan [24]

Answer:

3. Rocks erode and sediment is deposited.

4. No sediment is deposited over a long time.

Explanation:

An unconfomity is a break in stratigraphic record of a place usually as a result of non-deposition or erosion.

In a sequence of sedimentary rock strata some surfaces called unconformity surfaces gives clues about the depositional history of a particular place. During an unconfomity, there is usually no sediment deposition and when deposition resumes, the underlying rocks and the new ones will not share the same attribute especially by age. Unconformity can also be as a result of erosion of a sequence.

In the case of non- conformity, a sedimentary rock is deposited above an igneous or sedimentary rock. Option 5 is a simple example of an igneous intrusion called a sill. It is not unconformity.

3 0
4 years ago
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How does light travel?
ELEN [110]
D, light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving.
3 0
3 years ago
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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
1. An organism's body is constructed using the information contained in memory b. proteins. Ribosomes. d. Deoxyribonucleic acid.
soldi70 [24.7K]

Answer:

Deoxyribonucleic

Explanation:

The carry traits from offspring parent.

7 0
3 years ago
Why is the cohesion of water important for biological systems?
Kobotan [32]

Cohesion hold H Bonds together to create surface tension on water. And since water is attracted to other molecules it then sticks to other molecules.

hope i helped

7 0
3 years ago
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