Tag: diversity in living things and their classification

Questions Related to diversity in living things and their classification

Differentiate between vertebrates and invertebrates.

biology diversity in living things and their classification oviparous and viviparous number and shape of cells unicellular and multicellular organisms

  1. (i) Vertebrates: (a) Notochord is present, (b) True internal skeleton present.

    (ii) Invertebrates:(a) Notochord is absent, (b) No true internal skeleton present.

  2. (i) Vertebrates: (a) Notochord is absent, (b) No true internal skeleton present.

    (ii) Invertebrates: (a) Notochord is present, (b) True internal skeleton present.

  3. (i) Vertebrates: (a) Nervechord is present, (b) True internal skeleton present.

    (ii) Invertebrates:(a) Notochord is absent, (b) No true internal skeleton present.

  4. (i) Vertebrates: (a) Nervechord is present, (b) True internal skeleton present.

    (ii) Invertebrates:(a) Notochord is absent, (b) True internal skeleton present.

Show answer
Correct Option: A
Explanation:
  • Vertebrates have a backbone with a spinal cord, whereas invertebrates do not.
  • The diversity is exceptionally high among the invertebrates compared to vertebrates.
  • Vertebrates are always bilaterally symmetrical, while invertebrates could show either bilateral or radial symmetry.
  • Vertebrates are usually large-bodied and move fast compared to invertebrates.
  • Vertebrates have a closed blood system, a well-developed brain, either gills or lungs for respiration, and a complex and sophisticated nervous system, whereas those are primitive in invertebrates. Therefore, it concerns that vertebrates have many specializations to extract the best out of the environment compared to invertebrates.
  • Despite all these changes, someone could draw a point that invertebrates are more adaptive due to their simplicity, whereas vertebrates do not have good adaptability in comparison because of the specialization. However, I would like to quote a popular quote to finish that in evolution specialization paralyzes and ultra specialization kills the viability of taxons.

In the first year of a biennial plant, .......... grows then it enters a period of dormancy over the cold months

botany diversity in living things and their classification plant life cycle alternation of generations life span

  1. Leaves

  2. Stem

  3. Roots

  4. All of the above

Show answer
Correct Option: D

In first year, biennial plants are only

botany diversity in living things and their classification plant life cycle alternation of generations life span

  1. Reproductive

  2. Vegetative

  3. Both A and B

  4. None of the above

Show answer
Correct Option: B
Explanation:

Biennial are plants whose entire life cycle occurs within two years. In the first year, these plants are only vegetative, meaning that they don't produce reproductive structures. Rather, these plants will grow roots below ground and a small rosette of leaves near the surface

Identify a monocarpic plant from the following

botany diversity in living things and their classification plant life cycle alternation of generations life span

  1. Cuscuta

  2. Agave

  3. Mangifera

  4. Dalbergia

Show answer
Correct Option: B
Explanation:

A. Cuscuta is a parasitic plant with smallest flowers many times. It blooms many times. so it is a polycarpic plant  

B. Agave americana is a monocarpic plant because it flowers only once in its lifetime of 10 years and dies.
C. Mangifera indica is also a polycarpic plant as it flowers every year during its season.
D. Dalbergia plant flowers more than once in its lifetime.
So, the correct option is B

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'

Which of the following come under the category of plant materials?

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

  1. Stem

  2. Leaves

  3.  Gourds

  4. All of the above

Show answer
Correct Option: D
Explanation:

Plant materials include a wide and varied group of plant parts from many species. General categories of plant materials include grasses, rushes, barks, woods, gourds, stems, roots, seeds, and leaves. These materials can be used to construct baskets, netting, cordage, and even fabrics. Common production methods include felting, knitting, knotting, coiling, plaiting, and weaving. 

So, the correct answer is 'All of the above'.

In which plants stem are modified to store food and also act as organ of perennation to tide over conditions unfavourable for growth?

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

  1. Turmeric and Cucumber

  2. Chrysanthemum and Ginger

  3. Turmeric and Potato

  4. Euphorbia and Sweet Potato

Show answer
Correct Option: A

Twiners climb over the support with the help of?

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

  1. Adventitious roots

  2. Tendrils

  3. Stem itself

  4. Hooks

Show answer
Correct Option: C
Explanation:

Weak stemmed plants climb over the support are called twinners. They climb by the stem itself.

So, the correct option is 'stem itself'.