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Ipatiy [6.2K]
3 years ago
10

What can lead to scientists to change an evolutionary tree?

Biology
1 answer:
sergij07 [2.7K]3 years ago
7 0
New molecular evidence
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Senescence of the eyes is often demonstrated by the presence of
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Answer: Senescent cells

The Senescence of the eyes is often demonstrated by the presence of <span>senescence cells. They are forms of cells that are normally capable of replication within mammalian tissues but permanently non-dividing and share features with oncogene-induced senescence. </span>Moreover, the accumulation of senescent cells has been overwhelmingly studied using fibroblasts and has been proposed to act as an ageing mechanism. 

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3 years ago
During an investigation, Sam observes the number of hummingbirds that come to his large bird feeder at different times of day. H
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The answer is <span>Time is the independent variable, and the number of birds is the dependent variable. </span>

<span>An independent variable is variable that is not affected in the experiment. It is what experimenter controls. On the other side, a dependent variable is called dependent because it depends on the independent variables. It is what is affected during the experiment.
In Sam investigation, he controls time - he counts birds at 6 a.m. and 6 p.m. So, time is the independent variable. The number of birds is affected during the experiment, so it must be the dependent variable.

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3 years ago
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How is a viral antigen, like EBV, recognized by T cells? A. An antigen fragment is presented within class I MHC to the T cell re
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Viral antigens like EBV are usually recognized by T cells involving an antigen fragment present within class I MHC to the T cell receptor.

Ebstein Barr Virus

The Epstein-Barr virus is a human herpes virus with unusual biological characteristics.

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  • It is also a strong transforming virus in vitro for B cells and is linked to numerous significant lymphomas, including Burkitt's, Hodgkin's disease, and immunoblastic lymphoma.

With the exception of the memory compartment, each stage of the cycle has been shown to be possibly controlled by the immune response.

Epstein-Barr virus (EBV), commonly known as human herpes virus 4, is a double-stranded DNA herpes virus that is extensively spread. It is the cause of infectious mononucleosis.

  • EBV is most usually transmitted by body fluids, particularly saliva. EBV, on the other hand, can transmit by blood and sperm during sexual intercourse, blood transfusions, and organ transplants.

EBV can be transferred by utilizing materials that have recently been used by an infected individual, such as a toothbrush or a drinking glass.

  • The virus is likely to survive on an object for at least as long as it is wet.
  • When you initially get infected with EBV (primary EBV infection), you might spread the virus for weeks or even months before you notice any symptoms.
  • Once the virus has entered your body, it remains dormant.

Hence, the correct answer is option A

Learn more about EBV here,

brainly.com/question/12926983

# SPJ4

8 0
1 year ago
What does americanus represent in the scientific name of american frog bufo americanus?
otez555 [7]
Because it is often found in eastern united states
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3 years ago
Question 5 of 10
Sunny_sXe [5.5K]

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I think it is maybe running a marathon, but Google will be your friend I believe to check that.

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