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

Directions: This question presents a sentence, all or part of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is the best, choose the first answer; otherwise choose any one of the others.

Dinosaurs are traditionally classified as cold-blooded reptiles, but recent evidence based on their eating habits, posture, and skeletal structure suggested some may have been warm-blooded.

  1. eating habits, posture, and skeletal structure suggested some may have been warm-blooded.

  2. eating habits, postures, and skeletal structures suggested some may have been warm-blooded.

  3. eating habit, posture, and skeletal structure suggested some may have been warm-blooded.

  4. eating habits, posture, and skeletal structure suggested some might have been warm-blooded.

  5. eating habits, posture, and skeletal structure has suggested some may have been warm-blooded.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Explanation for (1): 'Skeletal structure suggested' is in past tense, whereas 'recent evidence' suggests the present.

Explanation for (2): This option makes unwarranted changes but fails to correct the error of tense.

Explanation for (3): This option makes unwarranted changes but fails to correct the error of tense.
Explanation for (4): This option makes unwarranted changes but fails to correct the error of tense. Explanation for (5): 'Skeletal structure suggested' is in past tense, whereas 'recent evidence' suggests the present. This option corrects the error.

Multiple choice

Which of the following is a phytoplankton?

  1. Bacteria

  2. Algae

  3. Fungi

  4. Protozoa

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

Phytoplankton are photosynthetic microscopic organisms that float near water surfaces. Algae are the primary phytoplankton, producing oxygen through photosynthesis. Bacteria, fungi, and protozoa are not classified as phytoplankton.

Multiple choice

The amphibians and reptiles have a

  1. three-chambered heart

  2. two-chambered heart

  3. four-chambered heart

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

Amphibians (like frogs) and reptiles (like lizards) have three-chambered hearts with two atria and one ventricle, which allows some mixing of oxygenated and deoxygenated blood. Fish have two-chambered hearts, while birds and mammals have four-chambered hearts.

Multiple choice

A type of agar, found after cutting an agar gel into cubes and passing distilled water upward thru the tiny cubes to wash out salts and other small molecules which diffuse out of the agar is known as

  1. South American White

  2. alginic acid

  3. agarose gel

  4. nobel agar

  5. bacteriological Agar
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Noble Agar is obtained by cutting an agar gel into cubes and passing distilled water upward through the tiny cubes to wash out salts and other small molecules which diffuse out of the agar.

Multiple choice

Four chambered heart is a characteristic feature of

  1. fishes

  2. amphibians

  3. reptiles

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

Four chambered heart is present in mammals and birds. Four chambers are left atrium, left ventricle, right atrium and right ventricle. Oxygenated blood passes from the left atrium into the left ventricle. Deoxygenated blood passes from the right atrium into the right ventricle. The hearts of mammals and birds are four chambered to prevent the oxygenated blood from mixing with blood containing carbon dioxide (deoxygenated blood).

Multiple choice

Polar bears can camouflage due to

  1. padded feet

  2. striped body

  3. white fur

  4. black skin

  5. two layers of fat
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

White fur provides camouflage due to white snow.