Questions

Q:

Which of the following is an example of secondary succession?

A) sedimentation on the bottom of drained lake B) landscaping at a golf course
C) reforestation of the cedar forests of the northwest D) scrub grasses growing on a newly exposed dune
 
Answer & Explanation Answer: C) reforestation of the cedar forests of the northwest

Explanation:

Secondary succession means in an ecosystem renewal of itself after all or a portion has been destroyed.

 

After a forest fire, the whole forest had destroyed but after that again renewal of that forest is also an example of secondary succession.

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Q:

Which two atoms form an ionic bond?

Answer

Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another.. This bond generates two oppositely charged ions.


In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.


 


Example ::


One example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to electrostatic forces.

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Q:

Anaerobic glycolysis occurs without

A) water B) glucose
C) oxygen D) All of the above
 
Answer & Explanation Answer: C) oxygen

Explanation:

Anaerobic glycolysis is the transformation of glucose to lactate when limited amounts of oxygen (O2) are available. 

 

Hence, Anaerobic glycolysis occurs without oxygen.

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Q:

Which of the following atoms has the largest radius?

A) Br B) K
C) Na D) Cl
 
Answer & Explanation Answer: B) K

Explanation:

For neutral atoms, the periodic trends in atomic size can be described like this

Atomic size decreases when going from left to right across a period,
Atomic size increases when going from top to bottom down a group.

 

Let's use these trends to try and figure out which atom would have the largest radius.

If you look at elements that are located in the same group, potassium will have a larger atomic radius when compared with sodium. Likewise, bromine will have a larger atomic radius when compared with chlorine.

Now focus on potassium and bromine. Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.

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Q:

Major fructose sources include

A) breads and cereals B) beer and liquor
C) milk and cheese D) fruits and honey
 
Answer & Explanation Answer: D) fruits and honey

Explanation:
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Q:

Demography is the scientific study of

A) Growth of population B) The well being of populations
C) Birth and death of population D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Demography is the scientific study of Birth and death, The well being and the Growth of population. In brief, it is the study of human populations based on their size, composition and distribution across space – and the process through which populations change.

Demography_is_the_scientific_study_of1554269267.jpg image

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Q:

The system unit of a personal computer typically contains all except

A) Modem B) Serial interface
C) Microprocessor D) Disk controller
 
Answer & Explanation Answer: A) Modem

Explanation:

The system unit of a personal computer typically contains microprocessor, disk controller and serial interface but it does not contain modem.

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Q:

What does it mean if a micrograph is false colored?

Answer

If a micrograph is false-colored, it means that the computer has created the colour for the object since we know that the electron microscopes sees only black and white colours.

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