Recently Asked Questions In Chemistry

Question

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Which health decisions can decrease the risk of non-communicable diseases? Check all that apply.

never using tobacco products

not drinking alcohol

eating a healthy diet

exercising regularly

I limiting exposure to ultraviolet light

I eating a diet high in fats and sugars

visiting the doctor

Done

) Intro

Answer

The health decisions that can decrease the risk of non-communicable diseases are: never using tobacco products, eating a healthy diet, exercising regularly, and limiting exposure to ultraviolet light.

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Non-communicable diseases are chronic diseases that are not caused by infectious agents and cannot be transmitted from one person to another. These diseases are often...

Question

The placenta, umbilical cord, and other membranes are detached and expelled during the stage of birth.

O third

O fourth

O second

O first

Answer

Fourth

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The fourth stage of birth is the expulsion stage, during which the placenta, umbilical cord, and other membranes are detached and expelled...

Question

14. The two main items

* 1 poir

addressed in Antigua and

Barbuda's Constitution are:

The structure of government and

fundamental rights;

The structure of government and

rights of the police;

The role of the Caw...

Answer

The two main items addressed in Antigua and Barbuda's Constitution are: the structure of government and fundamental rights, and the role of the Caw.

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Antigua and Barbuda's Constitution addresses two main items: the structure of government and fundamental rights, and the role of the Caw...

Question

Are/were viruses:(See page: 71spe)

A) The most abundant form of life on earth?

B) Discovered before bacteria?

C) Grown in animals in the laboratory?

D) The cause of all human disease?

Answer

A) No, B) No, C) Yes, D) No.

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None

Question

After the German capture of the Crimea, Hitler decided to invade Stalingrad, a major

O industrial center

O oil-producing area

O agricultural region

Answer

oil-producing area.

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Yes, Hitler decided to invade Stalingrad because it was a major oil-producing area. The city was strategically located on the Volga River,...

Question

OR THIS UNIT, YOU MAY SEE THE CORRECT ANSWERS FROM THE QUIZ TO ASSIST YOU ON YOUR

ETAKES. MAKE SURE THAT YOU LEARN FROM YOUR 'MISTAKES' ON THE LEARNING CHECK, IMPRE

OUR NOTES, AND REALLY LEARN THE MATERIAL SO THAT YOU CAN SCORE WELL ON THE FINAL U

ENCHMARK EXAM IN A FEW DAYS. YOU ARE NOT ALLOWED ANY RETAKES ON THE FINAL UNIT

ENCHMARK EXAM.

Question 1

1 pts

What is Albert Einstein's contribution to the understanding of nuclear energy?

• He proposed that matter can be converted to energy and vice versa.

• He first discovered that nuclear-reaction products are lighter than the reactants.

He developed the use of nuclear reactions to generate electricity.

He demonstrated that a uranium nucleus splits and releases neutrons.

Answer

He proposed that matter can be converted to energy and vice versa.

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Albert Einstein's most famous contribution to the understanding of nuclear energy is his famous equation E=mc², which states that matter and energy are interchangeable...

Question

Mercutio challenges Tybalt to a fight because

Answer

Mercutio challenges Tybalt to a fight because he is angered by Tybalt's insults towards Romeo.

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Mercutio is a close friend of Romeo and is angered by Tybalt's insults towards Romeo. He challenges Tybalt to a fight in...

Question

SC-GB2-18-AA The diagram below shows how DNA barcoding

is done using a plant sample. Which of the following BEST

explains what happens in step W?

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STEP W

STEP X

STEP Z

STEP Y

• a. Extraction of its chloroplast genome.

• b. Amplification of targeted genes/regions using polymerase chain

reaction.

O c. The DNA fragments from PCR are cleaned to remove buffer salts

or protein contaminants and then sequenced.

• d. Gel electrophoresis is used to check the size of the copied DNA

fragments and ensure there is plenty of good-quality DNA.

Neyt nage

Answer

The BEST explanation for step W is b. Amplification of targeted genes/regions using polymerase chain reaction.

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In step W, the DNA sample is subjected to PCR (polymerase chain reaction) which is a technique used to amplify or make multiple copies...

Question

MARK FOR REVIEW

Question 39 of 50

A food handler who is throwing out garbage in an outdoor dumpster must

ecure the garbage bag before throwing it in.

leave the lid open for easy access.

close the dumpster lid after throwing away the garbage.

make sure the garbage bag falls below the rim of the dumpster.

QUESTION/ANSWER RE

Answer

Close the dumpster lid after throwing away the garbage.

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A food handler must close the dumpster lid after throwing away the garbage in order to ensure that the garbage is properly contained and does not attract pests or...

Question

Which statement about the fossil record is correct?

A Extinction is a common event but is rarely seen in the fossil record.

B Extinction is a rare event and is rarely seen in the fossil record.

C Most species that have lived on Earth are still living.

D

Most species that have lived on Earth are now extinct.

Answer

D Most species that have lived on Earth are now extinct.

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The fossil record is a record of the species that have lived on Earth in the past. It shows that most species that have lived on Earth are now...