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 zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

The most fundamental characteristic of living being is __________________

  1. Locomotion

  2. Regeneration

  3. Fragmentation

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

  • Reproduction is the process by which new individual organisms or 'offsprings' are produced from their 'parents' and thus, 
  • it is a fundamental feature of all known life, each individual organism exists as a result of reproduction.

Therefore, the correct answer is option D.

Multiple choice biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

Blood platelets are found only in the blood of

  1. Birds

  2. Reptiles

  3. Mammals

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

Platelet also known as thrombocyte is a colourless, nonnucleated blood cell that is important in the formation of blood clots (coagulation). Platelets are found only in the blood of mammals. Platelets are formed when cytoplasmic fragments of megakaryocytes, which are very large cells in the bone marrow, pinch off into the circulation as they age. They are stored in the spleen. Hence, option C is the correct answer. 

Multiple choice biology body movement gait of animals basics of joints joints and type of joints

Which of the following animal's body shows bilateral symmetry?

  1. Starfish

  2. Jellyfish

  3. Earthworm

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

Bilateral symmetry means the body can be divided into identical left and right halves along a single plane. Among the choices, earthworms are annelids showing bilateral symmetry, whereas adult starfish are radially symmetrical, jellyfish are radially symmetrical, and sponges are mostly asymmetrical.

Multiple choice biology body movement gait of animals basics of joints joints and type of joints

The mallard duck possesses a keeled sternum. What is the function of this specialised bone structure?

  1. To provide stability in water

  2. To provide a site of attachment for the large flight muscles

  3. To increase the body's surface area for heat exchange

  4. It is a weapon used in sexual competition between males
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A keel in bird anatomy is an extension of the sternum (breastbone) which runs axially along the midline of the sternum and extends outward, perpendicular to the plane of the ribs.
In birds, the sternum (typically) has a keel-like projection to which the pectoral muscles attach; these muscles provide the all-important downstroke in powered flight. In contrast, flightless birds lack a keeled sternum -- if you don't have big, strong flight muscles, you don't need a keel to attach them to.
Multiple choice biology movements gait of animals basics of joints joints and type of joints skeleton, joints and muscles

In which bones shall have Haversian system ___________.

  1. Panther

  2. Python

  3. Pigeon

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

  • The osteon or Haversian system is the fundamental functional unit of much compact bone. 
  • Osteons are roughly cylindrical structures. 
  • Presence of the Haversian system is a typical character of mammalian bone. Panther is a mammal. Hence, bones of panther shall have a Haversian system.
So, the correct answer is 'panther'.

Multiple choice bio-chemistry biological oxidation chemiosmotic hypothesis living organisms and energy production mechanism of photosynthesis

Centrioles, cilia, flagella, and basal bodies have remarkably similar structural elements and arrangements. This leads us to which of the following as a probable hypothesis ?

  1. Disruption of one of these types of structure should necessarily disrupt each of the others as well.

  2. Loss of basal bodies should lead to loss of all cilia, flagella and centrioles

  3. Motor proteins such as dynein must have evolved before any of these four kinds of structure.

  4. Natural selection for motility must select for microtubular arrays in circular patterns.
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

The difference between different living things with respect to their appearance and mode of life is called as

  1. Classification

  2. Biodiversity

  3. Evolotion

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

  • Biodiversity means the diversity of living forms. Different life forms have a different physical appearance. 
  • Some are tall, some are short and their mode of life is also different. For example, some are autotrophs some are heterotrophs, some organisms live in water or land or both.
Therefore, the correct answer is option B.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Organism living in cold areas have shorter extremities than the organisms of warm area. It states

  1. Graubaer's law

  2. Dollo's law

  3. Allen's law

  4. Bergman's law
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The climatic conditions in a particular area regulate the  physiological and the morphological characteristics of plants or animals. Allen's rule is a biological rule by Joel Asaph Allen in 1877. It states that the organism adjusts in the given climatic conditions by either minimizing exposed surface area to minimize heat loss in cold climates or maximizing exposed surface area to maximize heat loss in hot climates. The rule predicts that endotherms from hot climates usually have ears, tails, limbs, snouts, etc that are long and thin, while equivalent animals from cold climates usually have shorter and thicker versions of those body parts. 

Allen's rule predicts that endothermic animals with the same body volume should have different surface areas that will either aid or impede their heat dissipation.

Multiple choice botany transpiration guttation excretion in plants long distance transport of water

Guttation occurs through

  1. Hydathodes

  2. Lenticels

  3. Cuticle

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The process of exudation of sap on the tips or edges of leaves in plant is called guttation. It takes place only under certain conditions like cold and high relative humidity in the atmosphere. It occurs through the specialized structures called hydathodes. They are generally restricted to the apex or the edges of the margins of leaves. Structurally, hydathodes consist of a simple pore in the epidermal layer found at the tip.


Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Choose the feature not associated with organism found in tropical deserts

  1. Small body size

  2. Large surface area relative to their volume

  3. Large body extremities

  4. Small surface area relative to their volume
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tropical desert areas are those where there is scarcity of water and extensive heat. Organisms in those areas adapt to survive in that ecological condition. Adaptations like thorns and succulents in flora helps the plants to survive without plenty of water. The leaves and stems undergo modification to conduct photosynthesis in less available water. Animals like frogs, rabbits, snakes, camels, etc. also go through modification in their characteristics to ensure their survival. Large surface of an any organism can lead to radiation of more body heat per unit of mass which can be fatal. Hence, such adaptations is not seen in organisms present in tropical desert.

So the correct option is 'large surface area relative to their volume'

Multiple choice biology environmental science plant adaptation adaptation in plants plant habitat

The bats are able to fly in dark since their mouth produce?

  1. Sound waves

  2. Ultrasonic waves

  3. Infrared rays

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

Bats navigate and locate obstacles or prey in total darkness by emitting high-frequency ultrasonic waves and listening to the returning echoes. This biological sonar system is known as echolocation.

Multiple choice biology environmental science plant adaptation adaptation in plants plant habitat

The bats are able to fly in dark since their mouth produce

  1. Sound waves

  2. Ultrasonic waves

  3. Infrared rays

  4. Ultraviolet rays
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Every night a bat puts in 600-700 kilometres of airtime. Flying low, the animals catch insects at speeds of around 40 metres per second. At night the bat uses its hearing to navigate its way to prey. Bats catch insects continuously using echolocation, an advanced navigation system. The bat emits ultrasonic waves with very high frequencies. Its calls are pitched at 20-100 kilohertz, a frequency that is too high-pitched for humans to hear naturally. Their sounds are reflected in the environment, hitting various objects and returning to the bat as echoes. The echo signals enable the bat to form a mental map of its surroundings.
So the correct option is 'ultrasonic waves'.
Multiple choice biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

Organisms may avoid stressful conditions by suspending their activities for sometime.If they do it to avoid high temperature it is called________ and if they do it to avoid low temperature then it is called ________ .

  1. aestivation, miigration

  2. migration, hibernation

  3. asetivation, hibernation

  4. hibernation, asetivation
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

Various organisms, if unable to migrate, might avoid the unfavorable environment by escaping in time. Polar bears go into hibernation during winter seasons to escape extreme cold. Some snails and fish undergo aestivastion to avoid summer-related problems like heat and desiccation, etc.