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

Absence of circulatory system, is compensated by

  1. pseudocoelomic fluid

  2. gastrovascular cavity

  3. presence of tentacles

  4. None of the above

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The gastrovascular cavity is the primary organ of digestion and circulation in two major animals- phyla: the Cnidaria (including jellyfish and corals) and Platyhelminthes (flatworms). The cavity may be extensively branched into a system of canals.

Multiple choice

Which of the following is not a character of 'Taenia solium'?

  1. Apolysis

  2. Proglottid

  3. Metamerism

  4. Strobila

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

Metamerism is the process of dividing into body segments.It is absent in 'Taenia solium'(though its body is divided into segments but the segmentation is not embryonic hence it is not considered as true metamerism)

Multiple choice

Regeneration in Hydra will be faster if it is cut from

  1. tentacles

  2. hypostome

  3. base

  4. All of these

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

From a single cut along the body column, two different types of regeneration arise; foot regeneration from the apical part and head regeneration from the basal part. The high proportion of stem cells in the Hydra body column supports these fast and efficient processes.

Multiple choice

Which of the following characters are present in class Crustacea?

  1. Cephalothorax, gills and appendages

  2. Head, thorax, gills and appendages

  3. Cephalothorax, book gills and appendages

  4. Head and thorax, book gills and appendages

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Crustaceans have a hard exoskeleton made of calcium. Thorax portion has two pairs of antennae, and three pairs of mouthparts. A pair of green glands excrete wastes near the base of antennae. The abdominal segments have swimmerets (swimming legs).

Multiple choice

Alginic acid is present in the cell wall of

  1. Bacillariophyceae

  2. Myxophyceae

  3. Xanthophyceae

  4. Laminaria

  5. -
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Alginic acid, also called algin or alginate, is an anionic polysaccharide that is distributed widely in the cell walls of brown algae.

Multiple choice

Archeopteryx is the connecting link between

  1. reptiles and birds

  2. birds and mammals

  3. amphibians and reptiles

  4. None of the above

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Archeopteryx is the connecting link (missing link) between reptiles and birds.