Questions

Q:

Is Osmosis Active or Passive?

Answer

Osmosis is the process in which water molecules move from a region of higher water potential to a region of lower potential down a water potential gradient across a partially permeable membrane. It doen't requires any additional energy to do this work. 


So, Osmosis is a Passive.


 


Active and passive transport processes are two ways molecules and other materials move in and out of cells and cross intracellular membranes.


1. Active transport is the movement of molecules or ions against a concentration gradient (from an area of lower to higher concentration), which does not ordinarily occur, so enzymes and energy are required.


2. Passive transport is the movement of molecules or ions from an area of higher to lower concentration. Passive transport occurs because of the entropy of the system, so additional energy isn't required for it to occur.



3. Active transport requires energy to proceed, while passive transport does not require the input of extra energy to occur.

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Q:

What is a single celled organism called

A) protoctists B) chromosomes
C) unicellular D) bicellular
 
Answer & Explanation Answer: C) unicellular

Explanation:

An organism is a living thing, and there are two broad categories of organisms: those made up of only a single cell, and those made up of multiple cells.

Single-celled organisms means which contains only one cell are called unicellular organisms. 'Uni-' means 'one,' so the name 'unicellular' literally means 'one cell.'

 

Examples of Unicellular or Single celled organisms ::

 

Prokaryotic organisms like Bacteria,...

Some algae like green algae, euglena,...

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Q:

Which of the following is an aerobic outdoor sport?

A) Swimming B) Cycling
C) Hiking D) Skydiving
 
Answer & Explanation Answer: D) Skydiving

Explanation:
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Q:

Where can an advertiser change the location targeting of an ad?

Answer

Location targeting is set at the campaign level.

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Q:

Valley of the Kings is located in which country?

A) Tanzania B) Italy
C) Egypt D) Turkey
 
Answer & Explanation Answer: C) Egypt

Explanation:
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Q:

Processing speed of computer is measured in MIPS.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

Million Instructions Per Second is a method of measuring the raw speed of a computer's processor. MIPS measures roughly the number of machine instructions that a computer can execute in one second.

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Q:

Do plant cells have Mitochondria?

A) Yes B) No
C) Can't be determined D) None
 
Answer & Explanation Answer: A) Yes

Explanation:

Yes, plant cells have Mitochondria.

While plant cells have chloroplasts to photosynthesize, they also require ATP for cellular functions, and do use oxygen to break down some of the sugar they produce in order to generate that ATP. They need mitochondria for this.

In particular, at night when there is no light, plants undergo cellular respiration since there is no sunlight to photosynthesize.

They do, however, produce far more sugar and oxygen through photosynthesis than they use up in respiration.

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Q:

Secondhand smoke is more dangerous in enclosed spaces.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

Secondhand smoke is very dangerous and creates serious health risks to you and your family members. 

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