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 biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

Which of the following characteristics does no species of animals posses during some phase of its life cycle?

  1. Mobility

  2. Autotrophy

  3. Responsiveness

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

Autotrophy is the ability of organisms to synthesise their own food from inorganic materials using light or chemical energy. This is seen in all green plants, some bacteria and algae. Animals, however, have a heterotrophic mode of nutrition. They acquire their food from other organisms. Animals, therefore, do not show autotrophy. 

So, the correct option is 'Autotrophy'.

Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

The branches Radiata and Bilateria of the Eumctazoa both exhibit:

  1. cephalization

  2. dominance of diploid life stage

  3. a complete digestive tract with separate mouth and anus

  4. three germ layers in embryonic development
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Multicellular animals have a dominant diploid life cycle (diplontic cycle) with the haploid generation reduced to the egg and sperm. The branches Radiata and Bilateria both include multicellular organisms, with Bilaterians a step more advanced than Radiata in multicellular complexity. Therefore both exhibit a diploid dominant life cycle. 

So, the correct option is 'dominance of the diploid life stage'.

Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

The subkingdom Parazoa consists of:

  1. radially symmetrical sponges, jellyfishes, and their relatives

  2. only animals that do not feed by ingestion

  3. animals with protostome-type development

  4. animals lacking tissues and organs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The subkingdom Parazoa includes multicellular organisms having less-specialized cells than in the Metazoa. It includes the phylum Porifera (sponges) and the organisms under this phylum lack tissues with a mass of cell embedded in a gelatinous matrix. Jellyfishes belong to the phylum Cnidaria and they do not belong to this subkingdom. 

So, the correct option is 'animals lacking tissues and organs'.

Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

Which one of the following animal is not deuterostome?

  1. Ambystoma

  2. Amphilina

  3. Anguilla

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

Deuterostomes are groups of animals that have true body cavities, in which the anus develops from the first opening in the embryo and the mouth develops later. All chordates are deuterostomes.

Ambystoma are a group of salamanders endemic to North America.
Anguilla is a species of eel, a snake-like, catadromous fish.

Amphiuma is a genus of aquatic salamanders. Therefore they all are deuterostomes.

Amphilina are platyhelminthes, which are parasitic in the body cavity of sturgeons. Therefore Amphilina is not a deuterostome. Hence, option B is correct.

Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

Organisms in the kingdom Animalia are 

  1. Multicellular and heterotrophic

  2. Multicellular and autotrophic

  3. Unicellular and autotrophic

  4. Unicellular and heterotrophic
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Animals are multicellular, eukaryotic organisms. All animals are heterotrophs, i.e., they can not synthesize their own food and depend on other organism for food.

Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

Characteristic of rotifers is

  1. Small size

  2. Ring of cilia

  3. Multicellular nature

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Rotifers are multicellular, microscopic and free-living microscopic or near-microscopic multicellular pseudocoelomate animals. Hence multicellular nature and small size
  • .They belong to the phylum Rotifera
  • They are characterized by having specialized organ systems and a complete digestive tract that includes both a mouth and anus. Since these characteristics are all uniquely animal characteristics, rotifers are recognized as animals or metazoans, even though they are microscopic.
  • Rotifers are called wheel animalcules because their corona is composed of several ciliated tufts around the mouth i.e ring of cilia, that in motion resemble a wheel. Hence Characteristic of rotifers is small size, ring of cilia and multicellular nature.
  • So, the correct answer is 'All the above'.
Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

Except cell membranes, cells of which of the following kingdom do not possess cell wall

  1. Plantae

  2. Monera

  3. Fungi

  4. Animalia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Animal shows different types of body organization.
  • Animals can be radial, asymmetric and bilateral symmetric.
  • Most of the animals are triploblastic.
  • The digestive system is incomplete in some phyla and complete in rest of the phyla.
So, the correct option is 'animalia'.
Multiple choice biology biodiversity and classification animal classification and its benefits criteria for new system of classification five kingdoms of living organisms

Choose the correct answers from the alternatives given.
Which one of the following is not a characteristic of organisms in the kingdom Animalia ?

  1. Eukaryotic cells without walls

  2. Multicellularity

  3. Obtaining nutrients by ingestion

  4. Storage of carbohydrates as starch
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plants store complex carbohydrates as starch and animals store them as glycogen in the muscles and liver. Glycogen is the storage form of glucose in animals and humans which is analogous to the starch in plants. Glycogen is synthesized and stored mainly in the liver and the muscles. Animals do not have a cell wall but instead, have the outermost plasma membrane or cell membrane on the exterior and with well-developed organelles enclosed in membranes (eukaryotes) and are also multicellular (being made of more than one cell) and are heterotrophic as animals cannot make their own food. 

So, the correct option is, 'Storage of carbohydrates as starch'.

Multiple choice photosystems photosynthesis in plants metabolism, cell respiration, and photosynthesis photosynthesis in higher plants biology

Photosynthetic bacteria do not contain

  1. PS - I

  2. PS - II

  3. PS - I or PS - III

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

There are only two photosystems PS I and PS II. Photosynthetic bacteria have only PS I and absence of PSII makes them carry out cyclic photophosphorylation wherein $H _2S$ serves as an electron donor, rather than water, and there is no release of oxygen. The low light intensity and anaerobic conditions favor cyclic photophosphorylation. The correct answer is B.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Which of the following groups contains uricotelic animals only ?

  1. Reptiles, birds, land snails, insects

  2. Reptiles, birds, land snails, aquatic insects

  3. Amphibians, birds, land snails, insects

  4. Amphibians, reptiles, birds, insects
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Reptiles, birds land snails and insects excrete nitrogenous wastes as uric acid in the form of white paste and thus they are called uricotelic animals. 

So, the correct answer is (A).

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Amarbel is an example of

  1. Autotroph

  2. Parasite

  3. Saprotroph

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

Amarbel is an example of the parasite. Cuscuta reflexa is the botanical name for the amarbel. It is also known as giant dodder. It grows in a creative manner over host plants and this species has the capability of producing numerous branches within a short period of time. Since it is a parasitic plant, so it depends on host plants for food. Over haustoria, amarbel provide communication with its host plants. Amarbel is widely used in the treatment for a headache, labour pain, bone fracture, fever and rheumatism. 

So, the correct answer is option B.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

Balanophora$/$ Orobanche is a

  1. Total root parasite

  2. Partial root parasite

  3. Partial stem parasite

  4. Total stem parasite
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Balanophora is a total root parasite because it sucks nutrients and water from the roots of host plants like cabbage etc for its survival. In turn, it causes harm to the host.

Thus the correct answer is 'Total root parasite'.

Multiple choice botany know the plant world closely nutrition and its types types of nutrition in plants different modes of nutrition in plants

We can demarcate a facultative parasite as one which

  1. Inevitably requires living host.

  2. Only requires dead organic matter to live.

  3. Is actually a parasite but can also become saprophyte.

  4. Is actually a saprophyte but can also become a parasite.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Facultative parasites are organisms which do not completely depend on a host for completing its life cycle, but may become parasitic in absence of food or other favorable conditions

Example: Armillaria species
So, the correct answer is 'Is actually a saprophyte but can also become a parasite'