Biology · Science General

Diversity in Living Organisms

3,323 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 is/are the features that all the chordates posses?

a. Vertebrates have bilaterally symmetrical body. b. They have a true vertebral column. c. They have dorsal nerve chord. d. They have chitinious exoskeleton.

  1. Only a, b and d

  2. Only a, b and c

  3. Only b, c and d

  4. Only a, c and d

  5. All of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct answer, as all  are correct statements about chordates. These animals have a true vertebral column and internal skeleton, allowing a completely different distribution of muscle attachment points to be used for movement. Vertebrates are bilaterally symmetrical, triploblastic, coelomic and segmented with complex differentiation of body tissues and organs.

Multiple choice

Match the following animals with their Phylum:

Animal Phylum
a. Honey bee 1. Mollusca
b. Snail 2. Echinodermata
c. Star fish 3. Arthropoda
d. Earthworm 4. Annelida

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

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

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

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

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

This is the correct matching. Honey bee belongs to the Phylum Arthropoda, Snail belongs to Phylum Mollusca, Star fish belongs to Phylum Echinodermata, and Earthworm belongs to Phylum Annelida.

Multiple choice

Which of the following statements is incorrect?

  1. Pisces are aquatic, have gills and have a two chambered heart.

  2. Amphibia are cold blooded with three chambered heart and their eggs are without coverings.

  3. Reptilia have a three chambered heart and eggs have hard covering.

  4. Aves are cold blooded, have a three chambered heart and have modified forelimbs.

  5. Mammalia are warm blooded, have a four chambered heart and have mammary glands.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This  is the correct answer, as this statement is incorrect. Aves have modified forelimbs for flight but they have a four chambered heart and are warm blooded.

Multiple choice

Which of the following is a phytoplankton?

  1. Bacteria

  2. Algae

  3. Fungi

  4. Protozoa

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

Phytoplankton are photosynthetic microscopic organisms that float near water surfaces. Algae are the primary phytoplankton, producing oxygen through photosynthesis. Bacteria, fungi, and protozoa are not classified as phytoplankton.

Multiple choice

The amphibians and reptiles have a

  1. three-chambered heart

  2. two-chambered heart

  3. four-chambered heart

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Amphibians (like frogs) and reptiles (like lizards) have three-chambered hearts with two atria and one ventricle, which allows some mixing of oxygenated and deoxygenated blood. Fish have two-chambered hearts, while birds and mammals have four-chambered hearts.

Multiple choice

Four chambered heart is a characteristic feature of

  1. fishes

  2. amphibians

  3. reptiles

  4. mammals
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Four chambered heart is present in mammals and birds. Four chambers are left atrium, left ventricle, right atrium and right ventricle. Oxygenated blood passes from the left atrium into the left ventricle. Deoxygenated blood passes from the right atrium into the right ventricle. The hearts of mammals and birds are four chambered to prevent the oxygenated blood from mixing with blood containing carbon dioxide (deoxygenated blood).

Multiple choice

Polar bears can camouflage due to

  1. padded feet

  2. striped body

  3. white fur

  4. black skin

  5. two layers of fat
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

White fur provides camouflage due to white snow.