Refer to the given dichotomous key and select the correct option.
I. a. Its edible part grows above ground. - Go to II
b. Its edible part grows below ground. - Go to III
II. a. It has reticulate venation in leaves - P
b. It has parallel venation in leaves - Q
III. a. It has tap root system - R
b. It has fibrous root system - S
A P could be coriander whereas R could be radish.
B Q could be potato whereas S could be onion.
C Q could be maize whereas R could be wheat.
D P could be mustard whereas S could be pea.
Ten male animals, each of type X and Y were living together for last few months in captivity in a well defined area (full of greenery). Other types of animals were not present in this area. Then an
animal Z was introduced in this area. After few days, their numbers were counted and tabulated
as shown here.
What does this indicate?
A Z is a carnivore.
B Y is a herbivore.
C X is a herbivore.
D All of these
Rini was asked to write some involuntary actions. She has written some voluntary actions also as shown in the list.
(ii) Sitting upright on a table
(iii) Digestion of food
(iv) Beating of heart
(v) Singing a song
(viii) Writing a letter
A(i), (iii), (vii) and (viii) only
B(ii), (vi) and (vii) only
C(iii), (iv) and (vii) only
D(ii), (v), (vi) and (vii) only
The given graph shows the variation of boiling point
of water with pressure.
Which of the following best represents the state(s) of water at points X, Y and Z?
Fill in the blanks by choosing the correct option.Turmeric is one of the most commonly used spices in
our kitchen. It leaves a yellow stain on white clothes.
On rubbing with soap which is p in nature, the yellow
stain changes to q colour. Now, if we pour some
r containing s over this stain, it again becomes
yellow in colour due to t .
|A||Alkaline||Red||Lemon juice||Acetic acid||Formation of water|
|B||Acidic||Green||Lime Lime||Sodium hydroxide||Neutralisawatertion reaction|
|C||Neutral||Dark pink||Lime water||Potassium hydroxide||Formation of water|
|D||Alkaline||Red||Lemon juice||Citric acid||Neutralisation reaction|
Study the given dichotomous key and select the correct option.
I. a. It is a unicellular organism - go to II
b. It is multicellular organism - go to III
II. a. It contains chlorophyll - P
b. It does not contain chlorophyll - Q
III. a. It is used in production of antibiotics - R
b. It decomposes the organic waste and dead plants and animals - S
AP could be Spirogyra whereas Q could be Rhizopus.
BR could be Penicillium whereas S could be diatoms.
CP could be Chlamydomonas whereas R could be Streptomyces.
DNone of these