Tag: botany

Questions Related to botany

Match List-I with List-II and select the correct answer using the codes given the lists.

List-I List-II
a. Smallest seed $1$. Mangroves
b. Pneumatophores $2$. Mesogeal
c. Germination in maize $3$. Sedges
d. Changing sites of plumule, radical, cotyledon $4$. N/A
botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

  1. A-$1$, B-$2$, C-$3$, D-$4$

  2. A-$4$, B-$1$, C-$3$, D-$2$

  3. A-$4$, B-$1$, C-$2$, D-$3$

  4. A-$1$, B-$2$, C-$4$, D-$3$

Show answer
Correct Option: A

Consider the following plants.
a. Bruguiera
b. Eugenia
c. Kandelia
d. Schima
Which of the above are mangrove trees?

botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

  1. $1$ and $2$

  2. $1$ and $3$ only

  3. $2$ and $4$

  4. $1, 3$ and $4$

Show answer
Correct Option: A

Which plant is found in mangrove zone?

botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

  1. Rhizophora

  2. Acacia

  3. Pinus

  4. Tectona grandis

Show answer
Correct Option: A
Explanation:

Rhizophora is a genus of tropical mangrove trees, sometimes collectively called true mangroves. The most notable species is the red mangrove. It is distributed in estuarine ecosystems throughout the tropics. Rhizophora mangle grows on aerial prop roots, which arch above the water level, giving this tree the characteristic mangrove appearance.

Therefore, the correct answer is option A.

Dunaliella is able to live in hypersaline lakes by developing a high osmotic pressure through accumulation of

botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

  1. Proline

  2. Sorbitol

  3. Glycerol

  4. All of the above

Show answer
Correct Option: C
Explanation:
Dunaliella are algal species which can survive in hypersaline lakes by preventing exosmosis. To achieve this, they store large amounts of Glycerol in their body which increases the osmotic pressure of their body fluids thus preventing exosmosis.
So, the correct answer is, 'Glycerol'.

Rhizophora occurs in

botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

  1. Tropical rain forest

  2. Tropical deciduous forest

  3. Mangrove

  4. Both A and B

Show answer
Correct Option: C
Explanation:

Rhizophora is a genus of tropical mangrove trees. It occurs in Mangrove forests. It is also called as true mangrove. These are found in coastal intertidal zone. They are adapted to live in harsh environmental conditions. Thus, the correct answer is 'Mangrove.'

Sunderbans contain mainly

botany adapting to a habit adaptations - mangrove swamps, fast flowing rivers and treetops halophiles protecting our environment

  1. Alpine trees

  2. Mangrove plants

  3. Grass

  4. Fir forests

Show answer
Correct Option: B
Explanation:

Sunderbans contain mainly mangrove plants. These are the mangrove area in the region of bay of Bengal. They have a thick canopy. The name is derived from the Sundari, the local name of the mangrove species Heritiera fomes. 

Thus, the correct answer is 'Mangrove plants.'

A small rootless aquatic herb in which a portion of leaf forms a tiny sack or bladder which traps water insects is

botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

  1. Dionaea

  2. Utricularia

  3. Sarracenia

  4. Drosera

Show answer
Correct Option: B
Explanation:

Utricularia are carnivorous plants which capture small prey with remarkable suction traps. These are rootless plants formed of very thin, forked leaves. Only the flower remain out of the water while the whole trap is underwater. When an aquatic animal touches its sensitive hairs, the traps suck it in, in just a few seconds, along with water, which is then drained through its walls.

So, the correct answer is " Urtticularia ".

Plants which synthesize their food themselves are called saprotrophs.

botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

  1. True

  2. False

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Correct Option: B
Explanation:

Plants which synthesise their food themselves are called autotrophs. That is, it doesn't depend on other organisms for food, using sunlight and water the plants makes their own food. They are considered as the producers in a food chain. Saprotrophs are the plants which feeds from the dead and decayed organic matters knows as detritius. Major saprotroph group includes fungi, bacteria and water molds.

So, the correct answer is option B.

Bt toxin gene has been cloned from the bacteria and expressed in plants to provide resistance to insects without the need for insecticides. Examples of such plants are

botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

  1. Cotton and corn

  2. Rice and potato

  3. Tomato and soybean

  4. All of these.

Show answer
Correct Option: D
Explanation:

Bt toxin gene has been closed from the bacteria and expressed in plants to provide resistance to insects without the need for insecticides. Examples are Bt cotton, Bt corn, rice, tomato, potato and soybean, etc.

Why vivipary is an undesirable character for annual crop plants?

botany diversity in living things and their classification diversity in plants types of nutrition in plants different modes of nutrition in plants

  1. It reduces is vigour of the plant

  2. It adversely affects the fertility of the plant

  3. The seeds exhibit long dormancy

  4. The seeds cannot be stored under normal conditions for next season

Show answer
Correct Option: D
Explanation:

Vivipary is a condition where seeds germinate on the plant. Most of the food crops are annuals and seeds are consumed as food. Therefore, if seeds germinate on the plant they cannot be utilized as food nor can they be stored for the next season. So, the correct answer is 'The seeds cannot be stored under normal conditions for next season'