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

Most plants differ from most animals in having

  1. localised growth areas and definite life spans

  2. localised growth areas and indefinite life spans

  3. general growth throughout the body and indefinite life spans

  4. general growth throughout the body and definite life spans
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plants exhibit localized growth in specific regions called meristems and have indeterminate growth, continuing to grow throughout their lifespan. Animals typically show generalized growth and have determinate growth with defined adult size and lifespan. Option B accurately captures both key characteristics.

Multiple choice

The fundamental difference between the living and non-living pertains to

  1. the property of locomotion

  2. the property of reproduction

  3. the existence of protoplasm

  4. interaction with oxygen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Protoplasm is the fundamental living material that defines all organisms. Locomotion isn't essential as plants are living but don't move, and reproduction isn't universal since sterile organisms like mules are still considered alive.

Multiple choice

The connecting link between annelids and molluscans is the _________.

In terms of evolution, connecting links connect two different phylogenetic groups, and hence possess characteristics of both the groups.

  1. Neoceratodus

  2. Peripatus

  3. Neopilina

  4. Neomenia

  5. Neocoelia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Neopilina is the connecting link between annelids and molluscans. Its annelid features include worm-like body, unjointed appendages, simple eyes and nephridia as excretory organs. Its molluscan features include presence of shell, mantle, soft and flat body and muscular foot.

Multiple choice

The fact that the animals residing in warm, humid regions have darker colour than their counterparts in dry regions can be explained by the ________.

In terms of evolution, associations of body size and of body temperature with the fitness have complex relationships for animals.

  1. Dollo’s rule

  2. Bergman’s rule

  3. Cope’s rule

  4. Gloger’s rule

  5. Allen’s rule
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gloger’s rule states that the animals residing in warm, humid regions have darker colour than their counterparts in dry regions.

Multiple choice

The living organisms having a single cell are known as

  1. bacteria

  2. virus

  3. unicellular

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

Unicellular refers to organisms that consist of a single cell, such as bacteria, protozoa, and some algae. Viruses are not considered living organisms as they cannot reproduce independently without a host cell.

Multiple choice

The smallest known cell is

  1. PPLO

  2. virus

  3. bacteria

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

PPLO (Pleuropneumonia-like organisms), now called Mycoplasma, are the smallest known cells (0.1-0.3 micrometers). Viruses are smaller but not cells, and bacteria are larger.

Multiple choice

Which of the following statements is 'false' regarding algae?

  1. It is seen in ponds as slimy green patches.

  2. It is green in colour.

  3. It performs photosynthesis.

  4. It is saprotrophic.

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Algae are slimy green organisms present in ponds. Moist forms of algae can perform photosynthesis and are thus, autotrophic. Saprotrophic nutrition is the mode of nutrition in which an organism lives on dead and decaying organic matter to draw nutrition. Therefore, it is an incorrect statement.

Multiple choice

Cell wall is not found in

  1. true fungi

  2. gram negative bacteria

  3. mycoplasma

  4. aquatic plants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mycoplasma lacks cell wall.