1
Q:

Which one of the following strongly threatens biodiversity?

A) Eragile ecosystems such as mangroves and wetlands B) Inaccessible habitates in the Himalayas
C) Desstruction of natural habitates and regetation and Jhum cultivation D) Creation of biosphere reserves

Answer:   C) Desstruction of natural habitates and regetation and Jhum cultivation



Explanation:
Subject: Biology
Q:

Which is the Largest Organ in the Human Body?

A) Heart B) Brain
C) Skin D) Liver
 
Answer & Explanation Answer: C) Skin

Explanation:

There are about 70 organs in the human body. The Top 10 largest organs in the human body based on size are:

1. Skin

2. Liver

3. Brain

4. Lungs

5. Heart

6. Kidneys

7. The Spleen

8. The Pancreas

9. Thyroxin

10. The Prostrate.

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Q:

Organisms need Nutrients in order to

A) Breaking down food B) Utilize chemical compounds
C) recycling D) None
 
Answer & Explanation Answer: A) Breaking down food

Explanation:

Nutrients are necessary for break down the food and supply energy to the organisms and to carry out essential life functions.

  • Important nutrients are Hydrogen, Carbon and Oxygen.

 

  • Some more important nutrients for plants are : Potassium, Sulphur, Nitrogen, Phosphorous, Calcium and Magnesium. 
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Q:

Saliva contains an Enzyme called

Answer

Amylase, also called Ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine is the Enzyme present in Saliva.

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Q:

The most healthy edible oil for heart is

A) Almond Oil B) Sesame Oil
C) Mustard Oil D) Olive Oil
 
Answer & Explanation Answer: D) Olive Oil

Explanation:
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Q:

Most abundant tissue in the body

A) Connective B) Nervous
C) Muscular D) Epithelial
 
Answer & Explanation Answer: A) Connective

Explanation:

There are four types of tissue in human body. They are 

 

1.Muscular
2.Connective
3.Epithelial
4.Nervous

 

Among these Connective Tissue are most abundant in our body

 

CONNECTIVE TISSUE

 

Functions:

 

1) Wraps around and cushions and protects organs
2) Stores nutrients
3) Internal support for organs
4) As tendon and ligaments protects joints and attached muscles to bone and each other
5) Runs through organ capsules and in deep layers of skin giving strength

 

The 3 Elements of Connective Tissue:
1) Ground substance – gel around cells and fibers
2) Fibers – provide strength, elasticity and support
3) Cells

 

There are 2 Kinds of Connective Tissue:

 

1) Loose Connective Tissue:

a) Areolar Connective Tissue – cushion around organs, loose arrangement of cells and fibers.
b) Adipose Tissue – storehouse for nutrients, packed with cells and blood vessels
c) Reticular Connective Tissue – internal supporting framework of some organs, delicate network of fibers
and cells

 

2) Dense Connective Tissue:

a) Dense Regular Connective Tissue – tendons and ligaments, regularly arranged bundles packed with fibers
running same way for strength in one direction.

b) Dense Irregular Connective Tissue – skin, organ capsules, irregularly arranged bundles packed with fibers
for strength in all directions.

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Q:

Hardest Part of the Human Body?

A) Tooth Enamel B) Femur
C) Temporal bone of skull D) Knee bone
 
Answer & Explanation Answer: A) Tooth Enamel

Explanation:

Tooth Enamel is the hardest and most highly mineralized substance in the human body. It is a tissue and not a bone. This tissue has high mineral content which makes it hardest substance.

 

Femur and Temporal bone of the skull are the hardest bones of the human body.

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Q:

What Is The Study Of Cells Called

A) Cellogysm B) Cytology
C) Cell Biology D) Both B & C
 
Answer & Explanation Answer: D) Both B & C

Explanation:

The branch of biology that studies the different structures and functions of the cell is called Cell Biology or Cytology.

 
Cell biology (formerly called Cytology), is a Greek word: kytos, "vessel" is a branch of biology that studies the different structures and functions of the cell and focuses mainly on the idea of the cell as the basic unit of life.


The cell (from Latin cella, meaning "small room") is the basic



        • Structural,
        • Functional (and) 
        • Biological unit of all known living organisms. 




A cell is the smallest unit of life that can replicate independently, and cells are often called the "building blocks of life". 

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Q:

Study Of Cells Is Called

A) Cellogysm B) Cell biology
C) Cell Organism D) None
 
Answer & Explanation Answer: B) Cell biology

Explanation:

The branch of biology that studies the different structures and functions of the cell is called Cell Biology or Cytology.

 

 A cell is the smallest unit of life that can replicate independently, and cells are often called the "building blocks of life"

  

Cell Biology deals with :

        • Life cycle 
        • Structure and organisation of cell organelles and their physiological properties. 
        • Metabolic processes 
        • Interactions with their environment 
        • Signalling pathways.
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