Biology · Science General

Diversity in Living Organisms

3,829 Questions

The diversity in living organisms deals with the classification of life forms into various kingdoms and phyla. This topic covers specific traits of bacteria, animal body cavities, and structural adaptations for survival. These fundamentals are crucial for biology sections in medical entrance and state board exams.

Animal phyla characteristicsBacteria and flagellaBiological adaptationsKingdom Animalia classificationBody cavity typesExtinct organism subphylaJawless animals identification

Diversity in Living Organisms Questions

Multiple choice

Match the following:

 
a. Bacteria 1. They do not have chlorophyll and do not show photosynthesis.
b. Fungi 2. They have cell walls, but do not have an organised nucleus and other structures.
c. Algae 3. They are plant-like organisms containing chlorophyll and producing food by photosynthesis.

  1. a - 3, b - 1, c - 2

  2. a - 2, b - 1, c - 3

  3. a - 1, b - 2, c - 3

  4. a - 1, b - 3, c - 2

  5. a - 2, b - 3, c - 1
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. Bacteria have cell walls, but do not have an organised nucleus and other structures. Fungi do not have chlorophyll and do not show photosynthesis. Algae are plant-like organisms containing chlorophyll and producing food by photosynthesis.

Multiple choice

Which of the following sets represents filamentous bacteriophages?

  1. M13 phage, T12 phage, fd phage

  2. M13 phage, f1 phage, fd phage

  3. T2 phage, f1 phage, fd phage

  4. M13 phage, MS2 phage, f1 phage

  5. MS2 phage, T12 phage, f1 phage
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

M13 is a filamentous bacteriophage composed of circular single stranded DNA (ssDNA). Filamentous bacteriophage fd is a type of filamentous bacteriophage known to infect Escherichia coli. Bacteriophage f1 is structurally classified as a class I filamentous phage.

Multiple choice

Arrange the following invertebrates in increasing order of number of species:

  1. Corals
  2. Crustaceans
  3. Arachnids
  4. Mollusks

  1. Arachnids, Mollusks, Crustaceans, Corals

  2. Coral, Crustaceans, Mollusks, Arachnids

  3. Crustaceans, Corals, Mollusks, Arachnids

  4. Mollusks, Arachnids, Crustaceans, Corals
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct order. The numbers of species in the four phyla are as follows: Arachnids - 1,02,248 Mollusks - 85,000 Crustaceans - 47,000 Corals - 2000

Multiple choice

Where are statocysts situated in mollusks?

  1. Gonads

  2. Foot

  3. Nephridia

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

Statocysts are situated in the foot of mollusks. These are balance receptors which maintain balance during movement of mollusks.

Multiple choice

The evolution of giraffe with long neck was explained by Lamarck. Which of the following reasons was given by him?

  1. The frequent turning back of neck for itching gradually elongated the neck in successive generations.

  2. Eating of the foliage high up on the trees as there was no vegetation on the ground in the desert areas, gradually elongated the neck in successive generations.

  3. Giraffe rested with its neck pulled behind, which gradually elongated the neck in successive generations.

  4. Giraffe had 90% of its diet including bamboo, which gradually elongated its neck in successive generations.

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

Yes, it is correct. This pulling of neck for food was found in the giraffes of dry and arid deserts of Africa.

Multiple choice

The wings of a bat and a bird are examples of

  1. analogous organs

  2. speciation

  3. homologous organs

  4. fossils
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wings of a bat and a bird have different structures and components. Wings of bats are skin folds stretched between elongated fingers, but wings of birds are a feathery covering all along the arm. They look similar because they have a common use for flying, but their origins are not common. Hence, they are analogous organs.

Multiple choice

Match the following ||| |---|---| |a. Amoeba|1. Special mouth parts| |b. Hydra|2. Pseudopodium| |c. Cockroach|3. Feeding tube| |d. Butterfly|4. Tentacles|

  1. a - 2, b - 4, c - 1, d - 3

  2. a - 3, b - 4, c - 1, d - 2

  3. a - 2, b - 1, c - 4, d - 3

  4. a - 2, b - 4, c - 3, d - 1

  5. a - 4, b - 2, c - 1, d - 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In amoeba, food is taken in from pseudopodium. In hydra, food is taken in with the help of tentacles. Cockroach has special mouth parts for taking in food. Butterfly uses its feeding tubes to suck nectar from flowers.