10 COMMON QUESTION ON BIOLOGY--3

Question 1

Plants absorb most part of water needed by them through their

  embryonic zone

  growing point

  root hairs

  zone of elongation

It's 'root hairs '
Root hairs form an important surface over which plants absorb most of their water and nutrients.

Question 2

Green pigment found in the leaf of plant is ______.

  Hemoglobin

  Chlorophyll

  Lycopin

  None of these

It's 'Chlorophyll '
Chlorophyll gives leaves their green color and absorbs light that is used inphotosynthesis.

Question 3

The disease diphtheria affects ___________.

  Lungs

  Intestine

  Throat

  Body joints

It's 'Throat '
Diphtheria is an infection caused by the bacterium Corynebacterium diphtheriae. Diphtheria causes a thick covering in the back of the throat.

Question 4

Which of the following types of teeth is used for grinding food?

  Canine

  Incisor

  Molar

  Milk

It's 'Molar '
The molar teeth are large, flat teeth at the back of the mouth. They are used primarily to grind food during chewing.

Question 5

Pace maker is related with _______.

  Kidney

  Brain

  Lung

  Heart

It's 'Heart '
A pacemaker is a small device that's placed in the chest or abdomen to help control abnormalheart rhythms.

Question 6

Branch of biology which deals with the study of identification, nomenclature and classification on organism is____.

  Exobiology

  Ecology

  Taxonomy

  Toxicology

It's 'Taxonomy '
Taxonomy is the science of naming, describing and classifying organisms and includes all plants, animals and microorganisms of the world.

Question 7

Smallest organism which cause disease _____.

  Bacteria

  Virus

  Mycoplasma

  All

It's 'Mycoplasma '
Mycoplasma species are the smallest bacterial cells yet discovered, can survive without oxygen and are typically about 0.1 µm in diameter.

Question 8

An orchid is considered to be a/an _______.

  Symbiont

  Endophyte

  Parasite

  Epiphyte

It's 'Epiphyte '
A majority of orchids are perennial epiphytes, which grow anchored to trees or shrubs in the tropics and subtropics.

Question 9

Botanical name of mango is ______.

  Mussa sapiantum

  Doccus corrota

  Mangifera indica

  None of these

It's 'Mangifera indica '
Mangifera indica is a species of mango in the Anacardiaceae family. It is found in the wild in India and cultivated varieties have been introduced to other warm regions of the world.

Question 10

Age of a tree can be estimated by __________?

  Its height and girth

  Biomass

  Number of annual rings

  Diameter of its heartwood

It's 'Number of annual rings '
Each year, the tree forms new cells, arranged in concentric circles called annual rings .These annual rings show the amount of wood produced duringone growing season.