Tag: botany

Questions Related to botany

You observed that a plant's younger leaves, not the older ones, are yellowing. You recall that the cause of plant sickness can be diagnosed by which leaves are yellowing.
What is the most likely cause of your plant's blight?

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Too much shade

  2. Lack of nitrogen-fixing Rhizobium bacteria

  3. A deficiency in a mobile mineral nutrient.

  4. A deficiency in a non-mobile mineral nutrient.

Show answer
Correct Option: D
Explanation:

If there is a deficiency of mobile nutrients, the symptoms are first seen in the leaves. Mobile and immobile nutrients refer to the transportability of these (K), (Mg), (Cl), (Zn) and (Mo).

So, the correct option is 'A deficiency in a non-mobile mineral nutrient'.

Buds that produced lateral branches develop at

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Internodes

  2. Apical meristems

  3. Auxillary meristems

  4. Nodes

Show answer
Correct Option: D

Buds typically occur at

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Leaf bases

  2. Leaf axils

  3. Tips of stems and roots

  4. Tips of branches and leaf bases

Show answer
Correct Option: D

The organism made up of only a single cell is known as 

botany living world of animals oviparous and viviparous number and shape of cells unicellular and multicellular organisms diversity and classification in animals

  1. Unicellular

  2. Acellular

  3. Multicellular

  4. None of the above

Show answer
Correct Option: A
Explanation:

The cell is the structural unit of life. Unicellular organisms are made up of one cell that performs all the functions and thus, called as a single-celled organism.

When the filament of anther is fixed at a point about the middle of the connective and the movement is free in the sac is called as ______

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Versatile

  2. Basifixed

  3. Adnate

  4. Dorsifixed

Show answer
Correct Option: A
Explanation:

In most grasses, the attachment is versatile where the filament is attached merely at a point about the middle of the connective so that the anthers can swing on it freely.

Which one of the following does not have a polycarpellary ovary?

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Guava

  2. Apple

  3. Coconut

  4. Fig

Show answer
Correct Option: D
Explanation:

Fig is a composite fruit which develops from a unicarpellary ovary which forms the fruitlets. Several fruitlets in a hypanthodium inflorescence form the actual fruit.

Guava is a false berry which develops from an inferior polycarpellary ovary.
Apple is a pome in which the fleshy part is the thalamus and inside it the actual fruit develops from a polycarpellary ovary.
Coconut is a type of drupe which develops from either a bicarpellary or a tetracarpellary ovary.
So, the correct answer is 'Fig'.

Hesperidium develops from an ovary which is

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Polycarpellary, superior and syncarpous

  2. Polycarpellary, inferior and syncarpous

  3. Polycarpellary, superior and apocarpous

  4. Bicarpellary, superior and syncarpous

Show answer
Correct Option: A
Explanation:
Hesperidium is a type of berry in which the epicarp and mesocarp fuse and form a leathery covering which can be removed and the endosperm forms the fibrous septa. It develops from a polycarpellary, superior and syncarpous ovary. So, the correct answer is 'Polycarpellary, superior and syncarpous'.

Vexillum, area and keel are

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Androecium

  2. Gynoecium

  3. Corolla

  4. Calyx

Show answer
Correct Option: C
Explanation:

Odd petal largest  posterior and outer most called vexillum (standard). It covers two wings (Alae) which in turn covers two small, fused petals called keel (carinae.)

Flowers showing basipetal succession are observed in

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Caesalpinia and Clerodendron

  2. Jasmine and Gold mohar

  3. Gold mohar and Caesalpinia

  4. Clerodendron and Jasmine

Show answer
Correct Option: D
Explanation:
Floral succession can be racemose, cymose, special type or mixed type. In racemose inflorescence, flowers are arranged in acropetal succession. in which the younger flowers are at the apex and the older flowers are at the base. In cymose inflorescence, flowers are arranged in basipetal succession in which the younger flowers are at the base and the older flowers are at the apex. Clerodendron and Jasmine show basipetal succession
So, the correct answer is 'Clerodendron and Jasmine'

When anthers have two chambers, they are described as.

botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

  1. Dioecious

  2. Dithecous

  3. Diadelphous

  4. Dimorphic

Show answer
Correct Option: B