Biology · Science General

Diversity in Living Organisms

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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 bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

Which of the following statements is true for eukaryotic cells?
i) They have unicellular cells only.
ii) They have a well organized nucleus.
iii) They have lysosomes and peroxisomes.
iv) Blue green algae are eukaryotic cells.

  1. ii and iii

  2. ii only

  3. i and ii

  4. i and iv
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Eukaryotic cells are multicellular cells. They have a well organized nucleus enclosed within nuclear membrane. They have cell organelles like mitochondria, chloroplast, lysosomes, peroxisomes, Golgi bodies, etc. Prokaryotic cells are unicellular cells. They do not have nuclear membrane. Blue green algae are prokaryotic cells as they do not have  membrane bound organelles and nucleus.

Thus, the correct answer is 'ii and iii'.

Multiple choice bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

Which one of these is not a eukaryote?

  1. Euglena

  2. Anabaena

  3. Spirogyra

  4. Agaricus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Eukaryotes are organisms whose cells have a nucleus enclosed within membranes, unlike prokaryotes, which have no membrane-bound organelles.
Anabaena is a genus of filamentous cyanobacteria that exist as plankton. They are known for nitrogen-fixing abilities and are prokaryotes.
Euglena is a genus of single-cell flagellate eukaryotes.
Spirogyra is a filamentous chlorophyte green algae, which is also a eukaryote.
Agaricus is a genus of mushrooms containing both edible and poisonous species, and are eukaryotes.
So the correct option is B.
Multiple choice bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell

Consider the following statements regarding characters of Archaebacteria that they share with eukaryotes:
I. The cell wall does not contain peptidoglycan.
II. DNA associated with histones.
III. Translation initiated with formylated methionine.
IV. RNA polymerase similar to eukaryotic RNA polymerase II
V. ATPase similarity
VI. Similar DNA replication and repair
How many of the above characters Archaebacteria share with eukaryotes?

  1. 3

  2. 4

  3. 5

  4. 6
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Following characteristics of Archaebacteria that they share with eukaryotes:

The cell wall does not contain peptidoglycan, DNA associated with histones, ATPase similarity.
So the correct option is '3.'

Multiple choice bio-chemistry unit of living - cell eukaryotic cell kinds of cell introduction to eukaryotic cell


9 + 2 fibrillar arrangement is present in:

  1. Bacterial flagella

  2. Bacterial fimbriae

  3. Eukaryotic flagella

  4. T4 bacteriophage
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The 9+2 microtubule arrangement (9 outer doublets + 2 central singlet microtubules) is characteristic of eukaryotic flagella and cilia. Bacterial flagella use a different structure (filament + hook + basal body), and fimbriae are protein filaments without this arrangement.

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

Which one of the following is not true of singing in male birds?

  1. All songs are learned from their parents

  2. It is done to claim a territory

  3. They generally sing at dawn or dusk.

  4. The typical song is characteristic of a species
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Singing is an essential part of bird life, but it's costly in terms of time and energy. Singing loud and proud first thing in the morning tells everyone within hearing distance that a bird is strong and healthy enough to survive the night. This is attractive to potential mates, and lets the competitors know that they still around and in charge of your territory. 

So the correct option is 'all songs are learned from their parents'.

Multiple choice biology animal behaviour ethology coordination in human beings- chemical control endocrine system in humans

Both reptiles and birds share a number of anatomical features which led biologists to believe that birds descended from reptiles. What are those features?

  1. Presence of an egg tooth in the young at the time of hatching

  2. Lower Jaw made up of five parts

  3. Presence of only one occipital condyle

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Since crocodiles plummet from a typical precursor with dinosaurs, they can give a helpful developmental correlation with feathered creatures. (In spite of their appearance, flying creatures are more firmly identified with crocs than reptiles are.). Fossilized skulls of child dinosaurs demonstrate a similar example they take after grown-up winged animals.

So, the correct option is 'All the above'.

Multiple choice biology movement and locomotion in living organisms movements in plants coordination in plants tropic and nastic movements in plants

Phototaxis is shown by

  1. Zoospores of Ulothrix

  2. Chlamydomonas

  3. Volvox

  4. All of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phototaxis is a movement of part of organism in response to the light. This phenomenon is exhibited by zoospores of certain algae like Ulothrix, Chlamydomonas, Volvox, Cladophora. They exhibit positive phototaxic movement in presence of diffused light and negative phototaxic movement in presence of intense light.

Thus, the correct answer is option D. 

Multiple choice biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth circulatory system and organs

In frogs, body proportions do not change with their growth. A frog  that is twice as long as another will be  heavier by approximately ?

  1. Two-fold

  2. Six-fold

  3. Four-fold

  4. Eight-fold
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In frogs, body proportions do not change with their growth. This means that the weight and height of a frog increase and decrease proportionately. If one of these parameters increase, so does the other, and by the same proportion, and vice-versa. Hence, if a frog is twice as long as another, it will be approximately two times heavier also.

So, the correct answer is 'Two-fold'.

Multiple choice movement in plants living world of plants - plant physiology biology

Movements of tentacles in Drosera are

  1. Photonastic

  2. Thermonastic

  3. Thigmonastic

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

Nastic movements are responses of plant parts to stimuli. Photonastic movement is the nastic response of plant in response to light. Thermonastic movement is the a nastic response of plant in response to change in temperature. Seismonastic movement is the nastic response of a plant to touch or vibration. Dropping of leaves of Mimosa pudica upon touching is due to seismonasty. Thigmonastic movement is the nastic response of a plant to touch. The movements of tentacles of Drosera when comes in contact with insect is due to thigmonasty.

Thus, the correct answer is option C.

Multiple choice movement in plants living world of plants - plant physiology biology

Movements of hair in Drosera is 

  1. Photonastic

  2. Thermonastic

  3. Thigmonastic

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

Any nastic movement in response to touch or contact stimulus is known as thigmonasty. The tentacles of Drosera leaves curve on coming with any insects and thus, the movement is categorised as thigmonasty which makes option C correct. Any nastic movements caused in response to sunlight or temperature stimuli are known as photonastic and thermonastic movements respectively. This makes options A and B incorrect. Nastic movements in response to any mechanical shock, such as blow, shaking or pressure, are known as seismonastic movements. This makes option D incorrect. Correct answer is C.

Multiple choice movement in plants living world of plants - plant physiology biology

Bending of tentacles in Drosera is thigmonasty.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Drosera also known as Sundew is one of the largest carnivorous plants. They capture and digest insects which they eat to supplement the poor mineral nutrition that they obtain from the soil in which they grow. They bear glandular tentacles which they use in capturing prey. The tentacles being extremely sensitive bend towards the centre of the leaf so as to bring the insect close to their glands. Since this bending takes place in response to the touch brought about by the insect, it is a type of thigmonasty

Thus, the correct answer is option A. 

Multiple choice movement in plants living world of plants - plant physiology biology

Which locomotory movement is not correct?

  1. Cyclosis and rotation of cytoplasm in Hydrilla

  2. Sucrose induced movement of sperms

  3. Flagellar movement of slime mould

  4. Chlamydomonas moves away from intense light
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cyclosis is also called as cytoplasmic streaming. It is the directed movement of cytosol and organelles. Rotational cyclosis is seen in Hydrilla. Sperm movement is induced by the change in intracellular ion concentration. Sperm motility is also induced by sucrose. Flagella is a locomotory organ that is seen in slime mould along with fungi, protozoan, etc. Slime mould shows flagellar movement. Chlamydomonas move towards the light.

Thus, the correct answer is option D.

Multiple choice evs super senses sleeping time animal senses sense organs in animals

Sloth is considered as folivores because 

  1. They sleep for 17 hours.

  2. The bulk of their diets consists of buds, tender shoots, and leaves.

  3. They are carnivores

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

A folivore is an organism that is a specialized herbivore and eat leaves. Sloth is an animal that feeds on leave buds and tender shoot. Due to the low metabolic rate, they don't have to eat much. So, they only eat leaves to survive.

So, the correct answer is 'The bulk of their diets consists of buds, tender shoots, and leaves'.

Multiple choice evs super senses sleeping time animal senses sense organs in animals

Unihemispheric sleep is the sleeping patterns in which 

  1. Animal sleeps for five hours

  2. Sleep with just one-half of their brain, while the other half remains alert for predators.

  3. Animals hibernate

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

In Unihemispheric sleep, also known as asymmetric slow-wave sleep, one half of the brain is in deep sleep, a form of non-rapid eye movement sleep and the eye corresponding to this half is closed while the other eye remains open. It keeps the organism alert for predators.

So, the correct option is 'Sleep with just one-half of their brain, while the other half remains alert for predators'.