1
Q:

What is the name of event caused by the 3200 Phaethon asteroid around 15 December of every year?

 

 

A) Geminid Meteor display B) Perseid Meteor display
C) Draconid Meteor display D) Lyrid Meteor display

Answer:   A) Geminid Meteor display



Explanation:
Subject: General Science
Exam Prep: Bank Exams
Q:

Ticks and mites are actually

A) Arachnids B) Insects
C) Myriapods D) Crustaceans
 
Answer & Explanation Answer: A) Arachnids

Explanation:
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7 1984
Q:

In a plant cell, DNA may be found in

A) only in the nucleus and mitochondria. B) only in the nucleus and chloroplasts
C) in the nucleus, mitochondria, and chloroplasts. D) only in the nucleus.
 
Answer & Explanation Answer: C) in the nucleus, mitochondria, and chloroplasts.

Explanation:

All of the genetic information in a cell was initially thought to be confined to the DNA in the chromosomes of the cell nucleus.

It is now known that small circular chromosomes, called extranuclear, or cytoplasmic, DNA, are located in two types of organelles found in the cytoplasm of the cell.

These organelles are the mitochondria in animal and plant cells and the chloroplasts in plant cells.

Chloroplast DNA (cpDNA) contains genes that are involved with aspects of photosynthesis and with components of the special protein-synthesizing apparatus that is active within the organelle.

Mitochondrial DNA (mtDNA) contains some of the genes that participate in the conversion of the energy of chemical bonds into the energy currency of the cell—a chemical called adenosine triphosphate (ATP)—as well as genes for mitochondrial protein synthesis.

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6 2595
Q:

Which of the following CANNOT be considered a single phase?

A) a heterogeneous mixture B) a pure solid
C) a pure liquid D) a homogeneous mixture
 
Answer & Explanation Answer: A) a heterogeneous mixture

Explanation:

A pure solid and a pure liquid are definitely a single phase because they are so united, or homogeneous. This leads to a homogeneous mixture also being a single phase.

 

Hence, the option that cannot be considered a single phase is A. a heterogeneous mixture.

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5 2236
Q:

Why is burning coal a major source of pollution?

Answer

Coal is chemically complex fuel. Whenever it is burned, gases are given off and particles of ash, called "fly ash," are released. Release of sulfur from burning into the air. The sulfur in coal combines with oxygen to form sulfur dioxide, which can be a major source of air pollution if emitted in large enough quantities. This stuff comes back as acid rain when it attaches itself to a raindrop. 


 


Today, many of the effects of coal burning have been reduced significantly or eliminated. This is super-nasty and is only stopped by buying low-sulfur coal from Montana or Wyoming. The eastern power plants have to pay to move the coal from out west and this increases the price of power production.

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1 2292
Q:

Plants are photosynthetic autotrophs.

What does this mean?

Answer

Plants are photosynthetic autotrophs, which means that they are able to produce their own food through the process called photosynthesis.


 


In photosynthesis, plants use light, water, and carbon dioxide to create glucose, which they convert to cellulose and use to make new cells.


 


Hence, that is why, Plants are called photosynthetic autotrophs.

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0 1997
Q:

The term biodiversity refers to

A) Range of genetic variation within a population B) Total number of different species within a habitat
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

The term biodiversity refers to the variety of life on Earth at all its levels, from genes to ecosystems, and the ecological and evolutionary processes that sustain it.

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9 9280
Q:

The concept of carbon credit originated from

A) G-8 Summit, Hciligendamm B) Earth Summit, Rio de Janeiro
C) Montreal Protocol D) Kyoto Protocol
 
Answer & Explanation Answer: D) Kyoto Protocol

Explanation:

The concept of carbon credit for manufacturers originated with the Kyoto Agreement (Protocol) of 1997.

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7 2453
Q:

What role does photosynthesis play in the carbon cycle?

Answer

In the process of photosynthesis, plants need the sun's energy, water to make food for themselves in the form of ATP ( adenosine triphosphate ) , which is packages of energy.


Carbon :


coming into the plants ( or algae ) along with water make those ATP into a bigger molecule, which is know as glucose.


Formula: 6 CO2 + 6 H2O + Suns Energy -> glucose + oxygen


Photosynthesis has an affect on the carbon cycle because it reduces the amount of CO2 in the air and redirects it into sugars which feeds animals as well as humans.


 


Hence, Photosynthesis removes CO2 from the atmosphere and replaces it with O2.

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0 2022