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

The structure of flagellum of a gram positive bacterium and a gram negative bacterium differs because of different

  1. protein arrangement

  2. cell wall structure

  3. cell membrane structure

  4. flagellin protein structure

  5. arrangement of flagella
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bacterial flagellum consists of three basic parts: the filament, hook and the basal body. The third part – basal body, is very important as it consists of several rings that anchor the flagellum into the plasma membrane and the cell membrane. A gram negative bacterium contains two pairs of rings that are attached to the different layers of the cell wall and the outer pair is specifically attached to the outer layer of the cell wall. As the outer cell wall is absent in a typical gram positive bacterial cell wall, it contains only the inner pair of rings that are inserted into the cell wall and plasma membrane. This structural arrangement of flagellum differentiates gram positive and gram negative bacterial cell’s flagella.

Multiple choice

Which of the following is not a property of prokaryotic cells?

  1. They are generally small in size.

  2. They vary in shape and size.

  3. They exhibit a wide variety of functions.

  4. They multiply slower than eukaryotic cells.

  5. They all have a cell wall surrounding the cell membrane, except in mycoplasma.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option.

Multiple choice

Australia’s national symbol is

Directions: Read the passage and answer the question that follows.

The dog fence in Australia has been erected to keep out hostile invaders, in this case hordes of yellow dogs called dingoes. The empire it preserves is that of wool growers. Yet the fence casts a much broader ecological shadow. For the early explorers, a kangaroo or a wallaby sighting marked a noteworthy event. Now try not to see one. Without a native predator there is no check on the marsupial population. The kangaroos are now cursed more than the dingoes. They have become rivals of sheep, competing for water and grass. The State Governments now cull more than three million kangaroos a year to keep Australia’s natural symbol from over running the pastoral lands.

  1. kangaroo

  2. wallaby

  3. sheep

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

(1) mentioned in the last line of the passage.

Multiple choice

Which one of the following statements is correct?

Directions: Read the passage and answer the question that follows.

Not all nocturnal animals have good eyesight. Many of them concentrate on the other senses for finding their way about and for finding food. The sense of touch is very developed in many nocturnal animals, whether they have good eyes or not. The large hairs or whiskers on the faces of cats and mice are sense organs and the animals react rapidly if these whiskers are touched. The sense of smell is also very important for nocturnal animals such as hedgehogs and field mice. The moist night air holds scent much better than dry air does.

  1. All nocturnal animals are blind.

  2. Many nocturnal animals do not have good eyesight.

  3. Most nocturnal animals cannot see anything in the dark.

  4. No nocturnal animals have good eyesight.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Not all nocturnal animals have good eyesight, first line of the passage.

Multiple choice

The cat’s whiskers are organs associated with the sense of

Directions: Read the passage and answer the question that follows.

Not all nocturnal animals have good eyesight. Many of them concentrate on the other senses for finding their way about and for finding food. The sense of touch is very developed in many nocturnal animals, whether they have good eyes or not. The large hairs or whiskers on the faces of cats and mice are sense organs and the animals react rapidly if these whiskers are touched. The sense of smell is also very important for nocturnal animals such as hedgehogs and field mice. The moist night air holds scent much better than dry air does.

  1. taste

  2. touch

  3. hearing

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

Whiskers are like the moustaches of the cat and are used as a sense organ for touch.

Multiple choice

What is a kookaburra, as inferred from the passage?

Directions: Read the passage and answer the question that follows.

While hiking in Carnarvon Gorge in Queensland, my family and I noticed a small group of birds diving in and out of the branches of a gum tree. They were chirping very loudly and obviously in distress. We could see a nest in the branches with baby birds inside and a very large goanna walking up the tree trunk, having eyed what he wanted for lunch. The small birds were desperate to chase the goanna away but had little hope because of their size. As we were contemplating what to do, a kookaburra flew down and thumped the goanna very solidly in his side, knocking him off the tree trunk. The small birds quickly settled down to care for their young.

  1. A wild animal

  2. A bird

  3. An insect

  4. A very ferocious bird
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It talks about the kookaburra flying, so it must be a bird.

Multiple choice

Where were the birds chirping?

Directions: Read the passage and answer the question that follows.

While hiking in Carnarvon Gorge in Queensland, my family and I noticed a small group of birds diving in and out of the branches of a gum tree. They were chirping very loudly and obviously in distress. We could see a nest in the branches with baby birds inside and a very large goanna walking up the tree trunk, having eyed what he wanted for lunch. The small birds were desperate to chase the goanna away but had little hope because of their size. As we were contemplating what to do, a kookaburra flew down and thumped the goanna very solidly in his side, knocking him off the tree trunk. The small birds quickly settled down to care for their young.

  1. Near a banyan tree

  2. Near an electric wire

  3. Near the branch of a big tree

  4. Near a gum tree
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mentioned in the 1st paragraph.

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)