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 is the largest phylum in the animal kingdom?

  1. Phylum Platyhelminthes

  2. Phylum Echinodermata

  3. Phylum Chordata

  4. Phylum Annelida

  5. Phylum Arthropoda
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

It is a phylum of triploblastic haemocoelomic, segmented invertebrates having head, thorax and abdomen, a chitinous exoskeleton and jointed legs and appendages. This phylum is the largest phylum in animal kingdom with 11 lakh species.

Multiple choice

Ammocoete larva is characteristic of

  1. Herdmania

  2. Lampreys

  3. Hagfishes

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

The Ammocoete larva is the larval stage of lampreys, which are jawless fish belonging to the order Petromyzontiformes.

Multiple choice

The slug like phase of the cellular slime mould life cycle is called a

  1. pseudo plasmodium

  2. plasmodium

  3. sporangia

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

When food runs out and they are ready to form sporangia, they do something radically different. They release signal molecules into their environment, by which they find each other and create swarms. These amoeba then join up into a tiny multicellular slug-like coordinated creature, which crawls to an open lit place and grows into a fruiting body. Some of the amoebae become spores to begin the next generation, but some of the amoebae sacrifice themselves to become a dead stalk, lifting the spores up into the air.

Multiple choice

Which of the following statements is true about amoeba?

  1. It does not have an outer shell.

  2. They form pseudopodia.

  3. They do not have food vacuoles.

  4. They have a flagellated phase in their life cycle.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pseudopodia are formed by microtubule and filament structures. The cell surface projects a membrane process called the lamellipodium, which is supported inside by filaments that form at the leading edge, turning into networks as they merge. Cytoplasm flows into the lamellipodium, forming the pseudopodia.

Multiple choice

Ciliates differ from all other protozoans in

  1. capturing prey with pseudopodia

  2. having two types of nuclei

  3. not using flagella for locomotion

  4. having contractile vacuoles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ciliates have two different sorts of nuclei: a small, diploid micronucleus (reproduction), and a large, polyploid macronucleus (general cell regulation). The latter is generated from the micronucleus by amplification of the genome and heavy editing. The micronucleus serves as the germ line nucleus, but does not express its genes. The macronucleus provides the nuclear RNA for vegetative growth.

Multiple choice

Which of the following is a character of euglenoids?

  1. They have cilia for locomotion.

  2. They have parasitic nutrition.

  3. They lack chlorophyll.

  4. They belong to kingdom Monera.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Euglena is a large genus of unicellular protists, which have both plant and animal characteristics. All are motile by means of a flagellum (animal characteristic). Most have chloroplasts (alga and plant characteristic).

Multiple choice

Euglenoid species that have chlorophyll are

  1. facultative autotrophs

  2. obligate autotrophs

  3. obligate heterotrophs

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

Euglenoid species that have chlorophyll are facultative heterotrophs in the absence of light or in abundance of dissolved food outside.