Questions

Q:

Select the correct statement contrasting gametophytes and sporophytes.

A) Sporophytes are diploid, whereas gametophytes are haploid. B) Sporophytes are vascular, whereas gametophytes are nonvascular.
C) Sporophytes are larger than gametophytes. D) All of the above
 
Answer & Explanation Answer: A) Sporophytes are diploid, whereas gametophytes are haploid.

Explanation:

Sexual reproduction results in gametes that combine two cells from different individuals. Meiosis also produces gametes. Haploids contain one set of chromosomes in each of their cells. Diploids cells contain two chromosome sets. For plants, haploid and diploid cells divide via mitosis. The plants’ haploid phase is called the gametophyte, and the diploid phase is called the sporophyte.

 

Sporophytes are diploid plants that use meiosis to produce spores. These spores are haploid cells that grow into haploid gametophytes. Megaspores grow into female gametophytes, and microspores grow into male gametophytes.

 

Gametophytes are haploid plants that use mitosis to make haploid gametes. These gametes are female in the form of an ovum (egg) or male in the form of sperm.

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Q:

Bone strength in later life depends on

A) the formation of dense bones during youth B) the increased calcium absorption in the elderly
C) the increased production of estrogen after menopause D) reducing physical activity to protect bones
 
Answer & Explanation Answer: A) the formation of dense bones during youth

Explanation:
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Q:

A group of giraffe is called as

A) colony B) tower
C) fleet D) pride
 
Answer & Explanation Answer: B) tower

Explanation:

A group of giraffes is called as tower.

Whereas

A group of ants is called as colony

A group of lions is called as pride

A group of ships is called as fleet.

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Filed Under: English
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Q:

Hydrophilic molecules readily associate with

A) water B) alcohols
C) both A & B D) none of the above
 
Answer & Explanation Answer: C) both A & B

Explanation:

Hydrophilic molecules readily associate with water molecules and water like molecules such as alcohols.

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Filed Under: Chemistry
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Q:

What is the capital of Korea,North?

A) Pyongyang B) Tokyo
C) Bissau D) none
 
Answer & Explanation Answer: A) Pyongyang

Explanation:
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Filed Under: Country Capitals

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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:

A parallel-plate capacitor of capacitance C1is  made  using  two  gold  plates.  Another parallel-plate capacitor of capacitance C2is made  using  two  aluminium  plates  with same  plate  separation,  and  all  the  four plates  are  of  same  area.  If gand aPare respectively  the  electrical  resistivities  of gold and aluminium, then which one of the following relations is correct?

A) C1>C2 B) C2>C1
C) C1pa = C2pg D) C1 = C2
 
Answer & Explanation Answer: D) C1 = C2

Explanation:

C1= capacitance of gold plates

C2=   capacitance   of   aluminium plates

rg= Gold’s resistivity

ra= Aluminium’s resistivity

As the capacitance depends on the shape,  size  &  geometrical  placing of  the  conductors  &  the  medium between them, hence, the value of capacitance  will  be  independent  of resistivity. Therefore, C1= C2

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Filed Under: Physics
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Q:

What sugar is found in DNA?

A) Ribose B) Deoxyribose
C) Pentose D) Sucrose
 
Answer & Explanation Answer: B) Deoxyribose

Explanation:

DNA - Deoxyribonucleic acid is a type of nucleic acid. The sugar contained in it is called Deoxyribose.

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