Tag: biology

Questions Related to biology

Primitive man evolved in ___________

biology evolution and biodiversity life introduction to plant kingdom classification of organisms

  1. Africa

  2. America

  3. Australia

  4. India

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Correct Option: A
Explanation:

The origin of primitive man or early hominid is believed to be have happened in southwestern Africa. Several theories propose that early homo sapiens evolved in Africa, and later migrated in other parts of the world.

The correct answer is A.

In structure of an ecosystem, composition of biological communities include:

biology evolution and biodiversity life introduction to plant kingdom classification of organisms

  1. Rate of production

  2. Species population, biomass, distribution

  3. Rate of temperature change

  4. Light and temperatue

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Correct Option: B

Which statement best explains why invertebrates regenerate lost tissue more readily than most vertebrates do? 

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Invertebrates contain specialized cells that produce the hormones necessary for this process.

  2. Invertebrate cells exhibit a higher degree of uncontrolled cell division than vertebrate cells do.

  3. Invertebrate animals reproduce asexually, but vertebrate animals reproduce sexually.

  4. Invertebrate animals have more undifferentiated cells than vertebrate animals have.

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Correct Option: D
Explanation:
Invertebrate animals have more undifferentiated cells than vertebrate animals have, which explains that they regenerate lost tissue more readily than most vertebrates. Invertebrates, animals without a backbone, such as an earthworm, are simpler than vertebrates, such as a human. Therefore, their cells are not as complex and they may be able to regenerate or grow lost body parts easier than a more complex animal. 
Therefore, the correct answer is option D.

The term Classification was coined by

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Theophrastus

  2. A.P.de candolle

  3. Aristotle

  4. Linnaeus

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Correct Option: A
Explanation:
  • The classification term was coined by 'Theophrastus'.
  • The term taxonomy was coined by A. P. de Candolle.
  • Aristotle divided animals into two groups based on whether they have red blood or not.
  • Linnaeus proposed a binomial system of nomenclature.
  • So, the correct option is 'Theophrastus'.

Classification deals with 

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Identification of organisms

  2. Arranging organisms into groups

  3. Arranging organisms in herbaria and museums.

  4. Naming, identification and grouping of organisms

Show answer
Correct Option: B
Explanation:
Classification deals with the arrangement of animals and plants in taxonomic groups according to their observed similarities and differences (including at least kingdom and phylum in animals, division in plants, and class, order, family, genus, and species).

Term vertebrate and invertebrate are given by 

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. John Ray

  2. Linneaus

  3. Lamark

  4. Leucart

Show answer
Correct Option: C
Explanation:

Lamarck, the French naturalist was the one who introduced the taxonomic distinction between vertebrates and invertebrates.
John ray was the first to give the definition of 'species'.
Carl Linnaeus gave the 'binomial nomenclature' for living beings.

Leuckart is remembered for his work in parasitology, particularly research regarding tapeworm and trichinosis. 
So, the correct answer is option C.

Nerve cord is in ............ position in invertebrates.

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Dorsal

  2. Lateral

  3. Ventral

  4. Absent

Show answer
Correct Option: C
Explanation:
The ventral nerve cord is a bundle of nerve fibers, typically a solid double strand (pair) of nerve cords, that runs along the longitudinal axis of some phyla of elongate invertebrates, and forms part of the invertebrate central nervous system. In most cases, this nerve cords runs ventrally, below the gut, and connects to the cerebral ganglia. Among the phyla exhibiting ventral nerve cords are nematodes (roundworms), annelids (such as earthworms, and arthropods (such as insects and crayfish).
The ventral nerve cord usually consists of a pair of partially fused nerve trunks running longitudinally along the ventral plane of the animals, from the anterior to posterior (the thoracic and abdominal tagma in the arthropods).

So, the correct answer is option A.

Which of the following are not the trends observed in the evolution of the central nervous system in invertebrates?

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Increased size of cerebral ganglia and formation of a 'brain'

  2. Reduction in the number of nerve cords

  3. Replacement of nerve cords by nerve nets

  4. Dominance of the ventral pair of nerve cords

Show answer
Correct Option: C
Explanation:

The nervous system of animals has evolved a lot from metazoans to mammals. Cnidarians happen to have the simplest nervous system comprising mainly nerve nets. It is assumed that this is the group of animals that the modern nervous system has evolved from. Hence, it can be said that nerve nets have been replaced by nerve nets and not the other way around.

So, the correct answer is 'Replacement of nerve cords by nerve nets'.

Valveless single chambered heart is found in

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Herdmania

  2. Scoliodon

  3. Catla

  4. Amphioxus

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Correct Option: A

.......... are called as moss animals.

biology biodiversity and its classifications life introduction to plant kingdom classification of organisms

  1. Loricifera

  2. Ectoprocta

  3. Acanthocephala

  4. Gastrotricha

Show answer
Correct Option: B
Explanation:

The Bryozoa, also known as Polyzoa, Ectoprocta or commonly as moss animals, are a phylum of aquatic invertebrate animals. They are filter feeders that sieve food particles out of the water using a retractable lophophore a "crown" of tentacles lined with cilia. Most marine species live in tropical waters, but a few occur in oceanic trenches, and others are found in polar waters. 

Therefore, the correct answer is option B.