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 the life cycle of animals how do animals reproduce? excretory, nervous and reproductive system structure and functions of living organisms -ii

In crocodiles male sex is predominant at

  1. Low temperature

  2. Intermediate temperature

  3. High temperature

  4. Ratio is genetically determined.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In crocodilians, sex determination is temperature-dependent. Males are typically produced at higher temperatures, while females are produced at lower temperatures.

Multiple choice chemistry d- and f-block elements actinoids the actinoids the d-and f-block elements comparison of lanthanoids and actinoids

Which of the following is not an actinoid ?

  1. Am

  2. Cm

  3. Fm

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

LANTHANIDES


58Ce  59Pr  60Nd  61Pm  62Sm  63Eu  64Gd  65Tb  66Dy  67Ho  68Er  69Tm  70Yb  71Lu 

ACTINIDES

 90Th 91 Pa 92 U 93 Np 94 Pu 95 Am 96 Cm 97Bk  98Cf  99Es  100 Fm 101 Md 102No  103Lr 
          
Multiple choice biology classification of plants thallophyta cryptograms kingdom plantae

Calcium deposition and larvicidal properties are found in

  1. Diatoms

  2. Oscillatoria

  3. Chara

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

Chara is a stonewort alga that deposits calcium carbonate on its cell walls, giving it a gritty texture, and it is known for its larvicidal properties.

Multiple choice biology classification of plants thallophyta cryptograms kingdom plantae

Which of the following is not correctly matched?

  1. Chlamydomonas - Unicellular flagellate

  2. Volvox - Colonial, non-flagellate

  3. Laminaria - Flattened leaf like thallus

  4. Chlorella - Unicellular, non-flagellate

  5. Spirogyra - Filamentous structure
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volvox is a colonial alga, but its individual cells are flagellated. The statement 'non-flagellate' is incorrect because the cells possess flagella for motility.

Multiple choice biology classification of plants thallophyta cryptograms kingdom plantae

The basal cell of Ulothrix is devoid of

  1. Chloroplast

  2. Pyrenoid

  3. Nucleus

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

The plant body consists of unbranched, uniseriate filaments. The cells of the filaments are arranged end to end. They are barrel-shaped or cylindrical in shape. The apical cell is somewhat rounded at its terminal end whereas, the basal cell is elongated and does not have chlorophyll. It is also called as the basal holdfast, which attaches the filament to the substratum.

Multiple choice evs life inside water aquatic habitat animal and habitat wonderful world of bholu

Which of the following are the characteristics of amphibians?

  1. They can survive on land as well as water.

  2. They live on trees.

  3. They are aquatic.

  4. Both A and B.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Amphibians are defined by their ability to live both on land and in water, which is the primary characteristic distinguishing them from purely aquatic or purely terrestrial animals.

Multiple choice biology excretion to maintain homeostasis excretion in other organisms other excretory organ role of other organs in excretion

Match the following w.r.t Platyhelminthes.

A) Flame Cells I. Anchorage
B) Hooks and Suckers II. Absorption
C) Regeneration III. Osmo regulation
D) Body surface IV. Planaria
  1. $A - II, B - IV, C - I, D - III$
  2. $A - III, B - I, C - IV, D - II$
  3. $A - III, B - II, C - III, D - I$
  4. $A - IV, B - II, C - I, D - III$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A flame cell is a specialized excretory cell found in the platyhelminthes like planaria. They  function like a kidney, removing waste materials by the process of osmoregulation.

Hooks and suckers are specialized structures in parasites of the platyhelminthes like tapeworm. It helps in attachment and anchoring to the host organisms.
Planaria can be cut into pieces, and each piece can regenerate into a complete organism. Cells at the location of the wound site proliferate to form a blastema that will differentiate into new tissues and regenerate the missing parts of the piece of the cut planaria.
Increased body surface helps in more absorption in platyhelminthes.
 So the correct answer should be option B "A-III, B-I, C-IV, D -II"

Multiple choice biology excretion to maintain homeostasis excretion in other organisms other excretory organ role of other organs in excretion

Which one of the following doesnt have a aminotelic excretory system?

  1. Asterias

  2. Unio

  3. Limnaea

  4. Oniscus

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Organisms which excretes amino acids are called aminotelic. Organisms like Asterias, Uni, Limnaea etc have an aminotelic excretory system. Oniscus is a land crustacean which excretes uric acid and falls into uricotelic category.

Since Oniscus is the odd one, the correct option is 'D'.

Multiple choice biology excretion to maintain homeostasis excretion in other organisms other excretory organ role of other organs in excretion

Fill up the blank spaces in the table below by selecting the correct option.

Phylum/Class Excretoryorgan Circulatorysystem Respiratoryorgan
Arthropoda A B Lungs/Gills/Tracheal system
C Nephridia Closed Skin
D Metanephridia Open E

  1. A-Green gland, B-Closed, C-Mollusca, D-Annelida, E-Tracheal system

  2. A-Malpighian tubule, B-Open, C-Annelida, D-Mollusca, E-Feather-like gills

  3. A-Antennary gland, B-Open, C-Porifera, D-Amphibia, E-Lungs

  4. A-Nephridia , B-Closed, C-Mollusca, D-Annelida, E-Lungs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A - Malpighian tubule

B - Open
C - Annelida
D - Mollusca
E - Feather- like gills
So, the correct answer is (b).

Multiple choice biology cell-the basic unit of life number and shape of cells unicellular and multicellular organisms cell parameters diversity and classification in animals

Cell size in unicellular organisms is 

  1. 0.5-10 micrometer

  2. 1.5-2.0 micrometer

  3. 2.5-3.0 micrometer

  4. 3.5-4.0 micrometer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The cell is the structural unit of life. Unicellular organisms are made up of one cell that performs all the functions. Its size is 0.5-10 micrometers, whereas, in multicellular organisms, cell size is 10-100 micrometers.