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

Which of the following statements is incorrect for Agaricus?

  1. The cells of opposite strains show somatogamy to form the dikaryotic mycelium.

  2. Hyphae are interwoven into thick cords known as Rhizomorphs.

  3. Agaricus is a genus of mushrooms containing only edible species

  4. Clamp connections are observed.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Agaricus is a genus of mushrooms containing both edible and poisonous species

Multiple choice

Which of the following is not a characteristic of viruses?

  1. They exist as obligate intra-cellular parasites.

  2. Their outer shell is called capsid.

  3. They replicate, but do not grow.

  4. Capsid is mostly made of polysaccharides.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Viruses are obligate intracellular parasites (true), have an outer shell called capsid (true), and replicate but don't grow/metabolize independently (true). However, capsids are made of protein subunits (capsomeres), NOT polysaccharides, making option D the correct 'not a characteristic' answer.

Multiple choice

What helps the snakes receive advance warning is their sensitivity to

Directions: Read the following passages and answer the question that follows.

PASSAGE – II
On a surface which is free from obstacles, such as a clear road or a path, only two or three species of snakes can hope to catch up with a human being, even if they are foolish to try. A snake seems to move very fast but its movements are deceptive. In spite of the swift, wave-like motions of its body, the snake crawls along the ground at no more than the speed of man’s walk. It may, however, have an advantage inside a jungle, where the progress of a man is obstructed by thorny bushes. But in such places, the footsteps of a man are usually more than enough to warn snakes to keep away. Although they have no ears of the usual kind, they can feel slight vibrations of the ground through their bodies, and thus get an early warning of danger.

 

  1. obstacles in the path

  2. smell of other beings

  3. sounds made by other beings

  4. movements of other beings
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

"the footsteps of a man are usually more than enough to warn snakes to keep away"

Multiple choice

The snake has an advantage over men inside a jungle because there

Directions: Read the following passages and answer the question that follows.

PASSAGE – II
On a surface which is free from obstacles, such as a clear road or a path, only two or three species of snakes can hope to catch up with a human being, even if they are foolish to try. A snake seems to move very fast but its movements are deceptive. In spite of the swift, wave-like motions of its body, the snake crawls along the ground at no more than the speed of man’s walk. It may, however, have an advantage inside a jungle, where the progress of a man is obstructed by thorny bushes. But in such places, the footsteps of a man are usually more than enough to warn snakes to keep away. Although they have no ears of the usual kind, they can feel slight vibrations of the ground through their bodies, and thus get an early warning of danger.

 

  1. it can crawl faster

  2. it gets advance warning

  3. man's movement is obstructed

  4. it is dark inside a jungle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

"It may, however, have an advantage inside a jungle, where the progress of a man is obstructed by thorny bushes."

Multiple choice

Organs of different organisms which are similar in structure but different in function are called

  1. homogeneous organs

  2. analogous organs

  3. homologous organs

  4. homophonous organs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Homologous organs share similar anatomical structure and embryonic origin but may serve different functions, like human arms, whale flippers, and bat wings. This differs from analogous organs which have similar function but different structure, like bird wings and insect wings.

Multiple choice

Which among the following statements is correct about blue-green algae?

  1. They are photosynthetic autotrophic bacteria.

  2. They are chemosynthetic autotrophic bacteria.

  3. They are heterotrophic bacteria.

  4. They are considered as archaebacteria.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

They are unicellular, colonial or filamentous, marine or terrestrial algae. Blue-green algae have chlorophyll, similar to green plants and hence, are photosynthetic autotrophs.

Multiple choice

Protists are useful in various manners. Which among the following is not a use of protists?

  1. Primary producer of aquatic ecosystem

  2. Commercial production

  3. Medicine production

  4. Biological pest control
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bacteria can also be used in the place of pesticides in the biological pest control. This commonly uses Bacillus thuringiensis (also called BT), a Gram-positive, soil dwelling bacterium. This bacteria is used as a Lepidopteran-specific insecticide under trade names such as Dipel and Thuricide.

Multiple choice

Which among the following can be excluded from the general characteristics of the kingdom Monera?

  1. The gram negative bacteria have an extra layer of glycol on the outside of the cell wall.

  2. Sexual reproduction is also seen in the kingdom Monera.

  3. Monerans may be obligate aerobes or obligate anaerobes.

  4. Their DNA is in double stranded form.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The gram negative bacteria has an extra layer of lipid on the outside of the cell wall and appears pink during the Gram staining procedure.

Multiple choice

Presence of a bladder is the common feature of

  1. teleostomi

  2. agnathostomes

  3. holocephali

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

Teleost fishes (are bony fishes) have developed an air bladder attached to the digestive system. It helps to give buoyancy.