Tag: absorption of water from the soil

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Questions Related to absorption of water from the soil

Multiple choice evs identifying the plants absorption of water from the soil root system the root system

Plants sense gravity with the help of

  1. Phytochromes

  2. Statoliths

  3. Phytohormones

  4. Abscisic acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the root cap there is a special subset of cells, called as statocytes. Inside the statocyst cells, some specialized amyloplasts are involved in the perception of gravity by the plant (gravitropism). Statoliths settle at the bottom part of their cells and allow plants to sense gravity. Statoliths are also found in the endodermal layer of the inflorescence stem. The redistribution of auxin causes the shoot to turn in a direction opposite that of the gravity stimuli.

So, the correct answer is 'Statoliths'.

Multiple choice evs identifying the plants absorption of water from the soil root system the root system

Choose the correct answers from the alternatives given.
Cortex is found in

  1. Stems only

  2. Roots only

  3. Roots and stems

  4. Roots, stems, and leaves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The cortex is the outermost layer of the stem or root of a plant, bounded on the outside by the epidermis and on the inside by the endodermis. In plants, it is composed mostly of differentiated cells, usually large thin-walled parenchyma cells of the ground tissue system.

Hence, the correct answer is 'Roots and stems'.

Multiple choice evs identifying the plants absorption of water from the soil root system the root system

Which of the following pairs is/are correct?
(A) Main root - Storage
(B) Lateral root - Absorption
(C) Root hair - Conduction

  1. All are correct

  2. A and B

  3. Only A

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The region of cell differentiation or maturation is differentiated into root hairs. Most of the water absorption occurs through this region.

The roots are modified to form storage roots such as conical, fusiform, napiform, tuberous
Lateral roots extend horizontally from the primary root and this contributes to water uptake and nutrient uptake.

So, the correct option is 'A and B'


Multiple choice evs identifying the plants absorption of water from the soil root system the root system

Meiosis occurs in

  1. Shoot apex

  2. Reproductive parts

  3. Root apex

  4. Leaf bud
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Meiosis is a specialized type of cell division which reduces the chromosome number by half. This process occurs in all sexually reproducing eukaryotes including animals, plants and fungi. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells with half the number of chromosomes as the original parent cell. Because the number of chromosomes is halved during meiosis, this allows gametes to fuse to form a zygote containing a mixture of paternal and maternal chromosomes.
Thus, meiosis and fertilization facilitate sexual reproduction with successive generations maintaining the same number of chromosomes. Meiosis occurs in reproductive parts. Mitosis occurs in vegetative parts like shoot apex, root apex and leaf bud. 
Thus, the correct answer is option B.

Multiple choice evs identifying the plants absorption of water from the soil root system the root system

Meiosis occurs in

  1. Shoot apex

  2. Reproductive parts

  3. Root apex

  4. Leaf bud
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Meiosis is a specialized type of cell division, which reduces the chromosome number by half. This process occurs in all sexually reproducing eukaryotes including animals, plants and fungi.

In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells with half the number of chromosomes as the original parent cell. Because the number of chromosomes is halved during meiosis, this allows gametes to fuse to form a zygote containing a mixture of paternal and maternal chromosomes. Thus, meiosis and fertilization facilitate sexual reproduction with successive generations maintaining the same number of chromosomes. Meiosis occurs in reproductive parts. 
Mitosis occurs in vegetative cells, such as cells of root apex, shoot apex and leaf bud. Thus, option B is correct.

Multiple choice evs identifying the plants absorption of water from the soil root system the root system

Pericycle in roots produces

  1. Mechanical support

  2. Lateral roots

  3. Vascular bundles

  4. Adventitious buds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Outer most part of the stele is pericycle . It is found in roots and dicot stem. in roots it is parenchymatous. In dicot root it is involved in the formation of lateral roots and in monocot roots it is involved in the formation of lateral roots.

So, the correct option is 'Lateral roots".