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

The classification of porifera is based on

  1. ascocytes

  2. canal system

  3. spicules

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

The classification of sponges (Porifera) is primarily based on the composition and structure of their endoskeleton, which consists of spicules (calcareous or siliceous) or spongin fibers.

Multiple choice

The basis of protozoan classification is

  1. measurement

  2. shape

  3. locomotory orgenelle

  4. number of nuclei
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Protozoa are classified into four main groups (Sarcodina, Mastigophora, Ciliophora, Sporozoa) primarily based on their locomotory organelles, such as pseudopodia, flagella, or cilia.

Multiple choice

Which one of the followings is an autotroph?

  1. Amoeba

  2. Monocystis

  3. Euglena

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Euglena is a unique protozoan that contains chloroplasts and can perform photosynthesis in the presence of light, making it an autotroph (or mixotroph).

Multiple choice

The characterstic of obelia is

  1. metagenesis

  2. metamorphosis

  3. complete coelom

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

Metagenesis is the alternation of generations between an asexual polyp phase and a sexual medusa phase, which is a hallmark of the life cycle of Obelia.

Multiple choice

Brain coral is

  1. Coralium

  2. Favia

  3. Tubipora

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

Meandrina is called brain coral.