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 biology selection and evolution theory of natural selection natural selection evidence for evolution

Appearance of ancestral characters in the new borne, such as tail, multiple mammae, etc., are known as

  1. Homologous

  2. Analogous

  3. Atavism

  4. Vestigial
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • In biology, an atavism is a modification of a biological structure whereby an ancestral trait reappears after having been lost through the evolutionary change in previous generations. For example, the Appearance of ancestral characters in the new borne, such as the tail, multiple mammae, etc in humans, Extra toes of the modern horse, Reappearance of prothoracic wings in insects, etc.
  • Hence Appearance of ancestral characters in the new borne, such as the tail, multiple mammae, etc., are known as an atavism.
  • So, the correct answer is 'Atavism'.
Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

The inclusion like raphides, druses and sphaeraphides can be mainly found in which of the following cells?

  1. Prokaryotic

  2. Protozoan cells

  3. Hygrophytic plant cells

  4. Xerophytic plant cells
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plant cells sometimes form mineral crystals. Calcium carbonate occurs as a mass of crystals around a cellulose core to form cystolith (eg, leaf of Banyan). In several plants, calcium oxalate forms needle-like raphides, prismatic crystals, star-shaped sphaeraphides or Druses or powdery mass named as crystal sand.

Xerophytes, in general, possess hypertonic cell sap and have higher mineral content which favours accumulation and formation of inorganic crystals.
Thus, the correct answer is option D.

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

In which of the following organisms you observe a cell with three different types of large organelles each bounded by two membranes?

  1. A plant

  2. A virus

  3. A fungus

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

The plant cell contains three different types of cell organelles which have two membranes. The chloroplast, mitochondria and the nucleus are the organelles which are surrounded by double membranous structures. The chloroplast is involved in photosynthesis, mitochondria performs respiration and the nucleus controls the activity of the other organelles. 

Thus, the correct answer is option A. 

Multiple choice evs animals- nature's gift animal and habitat wonderful world of bholu food material and source

Which of the following is need of desert animals?

  1. Water storage

  2. Large padded feet

  3. Tough skin

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

Desert animals require specific adaptations to survive extreme heat and water scarcity. Water storage, padded feet for walking on sand, and tough skin to prevent moisture loss are all common adaptations.

Multiple choice evs animals- nature's gift animal and habitat wonderful world of bholu food material and source

The rearing of animals for specific purposes is called domestication and such animals are called domestic animals. 

  1. True

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

The rearing of animals for specific purposes is called Animal husbandry. This branch concerned with animals that are raised for meat, eggs or other products. 

So the statement is False. 

Multiple choice biology plant growth seed dormancy fruit plants: structure and function

Which of the following is not the example of escape in time?

  1. Seed dormancy

  2. Arctic tern

  3. Diapause

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

Escape in time refers to strategies like dormancy, diapause, or hibernation that allow organisms to survive unfavorable periods. The Arctic tern is a migratory bird, which is an example of escape in space.

Multiple choice zoology environmental factors environmental factors and their measurements climate factors marine life

Which the following statement is incorrect?

  1. Osmoconformers are able to maintain osmotic concentration of their cells by either physiological or behavioral means

  2. Most vertebrates, except the birds and mammals are unable to theregulate

  3. Success of mammals is mainly due to their ability to thermoregulate and live comfortably whether they are in Antarctica or in Sahara desert.

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

Osmocoformers are the organisms that change the osmotic concentration of their body with the change in ambient conditions. Their body fluids are in osmotic balance with the environment For many marine invertebrates the osmolarity and ionic concentrations of their body fluids are similar to those of the sea water in which they live. 

Multiple choice physics the kinetic model of matter evaporation heat, internal energy and work phase change

A dog pants with its tongue sticking out on a hot day. Which of the following is the correct reason?

  1. It is its habit

  2. Producing more saliva cools down the body temperature.

  3. Saliva vapourises, cooling the tongue

  4. It is a genetic disease found in few animals like dogs.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Evaporation causes cooling.
A dog pants with its tongue sticking out on a hot day because its saliva vapourises, cooling the tongue.

Multiple choice biology transport in plant transport of water and minerals conduction of water and minerals absorption of water and minerals in plants

Choose the correct answers from the alternatives given.
An arachnid differs from a crustacean because:

  1. arachnids lack antennae

  2. arachnids are mostly aquatic and crustaceans are mostly terrestrial

  3. only arachnids shed their exoskeletons

  4. only arachnids have two major body segments of cephalothorax and abdomen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Crustaceans and Arachnida are classes of Phylum Arthropoda. Crustaceans have 2 pairs of antennae but in arachnids they are absent. 
So the correct answer is "arachnids lack antennae".
Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Microlecithal eggs are found in

  1. Reptilia and Aves

  2. Amphibia, Aves and Reptilia

  3. Reptilia, Aves and Chiroptera

  4. Eutheria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Eutheria includes the placental mammals. Placental mammals are characterized by the development of a placenta. The egg of these animals has very little (microlecithal eggs) or no yolk. The egg of reptiles and birds is rich in the yolk. The placenta in eutherians forms from both embryonic membranes and the maternal uterine wall. The blood vessels of the embryo come very close to the blood vessels of the mother, so materials can be exchanged by diffusion. The placenta allows the young to remain within the mother's body until embryonic development is complete. 
So, the correct answer is option D.