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

Classify the following organisms (A-crab, B-cuttlefish and C-earthworm):

  1. A - Annelida; B -Mollusca; C - Arthropoda

  2. A - Annelida; B -Cnidaria; C - Arthropoda

  3. A - Arthropoda; B -Cnidaria; C - Annelida

  4. A - Arthropoda; B -Mollusca; C - Annelida
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crabs are Arthropoda, cuttlefish are Mollusca, and earthworms are Annelida. Option D correctly identifies these groups.

Multiple choice

Platyhelminthes are a unique phylum because they include:

  1. Unsegmented flatworms such as the parasitic tapeworm

  2. Unsegmented roundworms such as the parasitic tapeworm

  3. Segmented roundworms such as the parasitic tapeworm

  4. Segmented flatworms such as the parasitic tapeworm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Platyhelminthes are flatworms characterized by their lack of body segments and a flattened body shape. Tapeworms are a classic example of this phylum.

Multiple choice

This spider is classified in which phylum?

  1. Mollusca

  2. Annelida

  3. Platyhelminthes

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

Spiders have jointed legs and an exoskeleton, which are the primary defining characteristics of the phylum Arthropoda.

Multiple choice

This snail belongs to which phylum?

  1. Platyhelminthes

  2. Arthropoda

  3. Mollusca

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

Snails are soft-bodied invertebrates that typically possess a mantle and a muscular foot, placing them in the phylum Mollusca.

Multiple choice

Cnidaria have which of the following features?

  1. Contain pores

  2. Nematocysts

  3. Segmented bodies

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

Cnidarians are defined by specialized stinging cells called nematocysts, which they use for defense and capturing prey.

Multiple choice

Which of the following is not a feature of Porifera?

  1. Contain pores

  2. No distinct internal organs

  3. No muscle or nerve tissue

  4. A mouth and digestive system
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Porifera (sponges) are the simplest animals; they lack true tissues, organs, a mouth, and a digestive system, relying on water flow through pores for feeding.

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Can microorganisms be seen with the naked eye? 

  1. Yes

  2. No

  3. Ambiguous

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

Average diameter of microorganisms, like bacteria, is 0.2 to 2 micrometer. They cannot be seen with the naked eye. Microscope is used to observe such small microorganisms. It uses lens or combination of lenses to produce a magnified image of tiny objects which are not visible to the naked eye.

Multiple choice

Amphibians have features which include which of the following?

  1. Warm-blooded and have moist skin

  2. Warm-blooded and have dry skin

  3. Cold-blooded and have moist skin

  4. Cold-blooded and have dry skin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Amphibians are cold-blooded vertebrates that typically spend part of their life in water and part on land. They are characterized by having moist, permeable skin.

Multiple choice

Reptiles are characterized by which of the following features?

  1. Warm-blooded and have scaly skin

  2. Cold-blooded and have smooth skin

  3. Warm-blooded and have smooth skin

  4. Cold-blooded and have scaly skin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Reptiles are cold-blooded vertebrates that breathe air and have skin covered in scales or scutes. This distinguishes them from amphibians, which have moist skin.

Multiple choice

Which of the following describe features of birds?

  1. Warm blooded, toothless beaked jaws, lay hard shelled eggs.

  2. Warm blooded, toothed beaked jaws, lay hard shelled eggs.

  3. Cold blooded, toothless beaked jaws, lay hard shelled eggs.

  4. Cold blooded, toothed beaked jaws, lay hard shelled eggs.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Birds are warm-blooded vertebrates with feathers, toothless beaked jaws, and they lay hard-shelled eggs.