Recently Asked Questions In History

Question

What method might be used to

obtain climate data from thousands

of years ago?

A. carbon 14 dating of fossils

B. reviewing written climatological records

C. measuring the temperature at various ocean

depths

D. analysis of atmospheric gases in ice cores

Answer

D. analysis of atmospheric gases in ice cores.

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Ice cores are cylindrical samples of ice that are drilled from ice sheets or glaciers. These ice cores contain layers of snow that have accumulated over thousands of...

Question

neously capable of fighting against the "flu"

virus. This reaction of the body if made easier

by the "anti-flu" vaccine which is obtained from

Mice, as well as humans, are sponta

the inactivated virus.

The table below summarizes certain expe-

riments and results realized on mice.

Non vaccinated Results after a

period of tirne

mice, that are

infected by the

"flu" virus

Case 1 Mice are born

Multiplication of

without a thymus the virus

Case 2 Mice are born

without a thymus,

then subjected to

njections of serum

trom vaccinated

Viruses do not

disappear from

the body, but they

stop multiplying

mice

Case 3 Mice are deprived of

B lymphocytes

Viruses disappear

5

a- Referring to your acquired knowledge

and to the obtained results, explain how an

organism fights against the "flu".

.

Answer

The organism fights against the "flu" virus by producing an immune response. This response involves the activation of B lymphocytes, which produce antibodies that recognize and neutralize the virus. Additionally, T lymphocytes are activated to kill infected cells. The body's immune response can be enhanced by vaccination, which stimulates the production of specific antibodies against the virus. In the experiments with mice, it was observed that mice without a thymus or with depleted B lymphocytes had a weaker immune response and were less able to fight off the virus.

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The immune response against the "flu" virus involves both the innate and adaptive immune systems. The innate immune system provides the first line of defense against...

Question

What type of reproductive strategy would best allow a population to better adapt to a changing environment?

Answer

A reproductive strategy that emphasizes genetic diversity would best allow a population to better adapt to a changing environment.

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A reproductive strategy that emphasizes genetic diversity would best allow a population to better adapt to a changing environment. This is because a population with a greater variety...

Question

2.Organic chemistry.is the study of the structure, properties, composition and reaction of

living organism.

OTrue

OFalse

Answer

False. Organic chemistry is the study of the structure, properties, composition, and reactions of organic compounds, which are compounds that contain carbon.

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Organic chemistry is a branch of chemistry that deals with the study of organic compounds, which are compounds that contain carbon. Organic compounds are found in...

Question

on

La verdad consiste en la adecuación entre el pensamiento y la realidad

O Verdadero

O Falso

Answer

Falso

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La verdad consiste en la correspondencia entre el pensamiento y la realidad, no en la adecuación...

Question

2) The employees at a retail store earn $8.75 per hour.

They earn 1.5 times their hourly wage for every

hour they work over 40 hours in a week. If an

employee works 52 hours in a week, how much

did they earn for that week?

Answer

The employee earned $637.50 for the week.

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None

Question

Which tea S from China?

A Lapsang souchong B Earl Grey

C

Darjeeling

Answer

A Lapsang souchong

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Lapsang souchong is a type of black tea that is produced in the Wuyi Mountains of China's Fujian province. Earl...

Question

An internet gateway often used by

companies in order to increase

efficiency is called a(n)

A. proxy server

B. cookle

C. web address

D. IP address

Answer

A. Proxy server.

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A proxy server is a server that acts as an intermediary between a client and another server, usually the internet. It can be used by companies to...

Question

nere de 70-130 de cuvinte, in care să relatezi o intamplare petrecuta in cadr

puncte

uUnui ateller de magie la care ai participat și tu.

14

Answer

Am participat la un atelier de magie unde am învățat să facem trucuri cu carti de joc, să facem obiecte să zboare și să facem alte trucuri magice. Am învățat cum să folosim magia pentru a ne amuza și a ne bucura de ea. Am învățat să ne folosim de magie pentru a ne ajuta și a ne îmbunătăți viețile. A fost o experiență minunată și am învățat multe lucruri noi.

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Am participat la un atelier de magie unde am învățat să facem trucuri cu...

Question

Which of the following forms of magnesium has

the SMALLEST ionic radius?

A. Mg

B. Mg*

C. Mg?*

Answer

B. Mg*

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The ionic radius of Mg* is the smallest because it has a higher charge than Mg and Mg?*...