01 The Living World

Exercise

Question:

Write the correct sequence of hierarchy of taxonomic categories.

Answer:

  1. Kingdom
  2. Phylum
  3. Class
  4. Order
  5. Family
  6. Genus
  7. Species

Question:

How is a key helpful in the identification and classification of an organism?

Answer:

  1. A key is helpful in the identification and classification of an organism because it provides a systematic method for comparing and contrasting the characteristics of similar organisms.

  2. By comparing the characteristics of an organism to those listed in a key, it is possible to determine the identity and classification of the organism.

  3. Keys are typically organized into a series of paired statements that describe different characteristics of an organism.

  4. By selecting the statement that best matches the organism, the user can narrow down the list of possible organisms until the identity of the organism is determined.

  5. Once the identity of the organism is established, the user can then use the key to determine the organism’s classification.

Question:

What different criteria would you choose to classify people that you meet often?

Answer:

  1. Location: Where do they live?
  2. Age: How old are they?
  3. Profession: What type of job do they have?
  4. Interests: What hobbies and interests do they have?
  5. Education: What level of education do they have?
  6. Family: Do they have a family?
  7. Religion: What religion do they practice?
  8. Political views: What are their political views?
  9. Values: What values do they prioritize?
  10. Personality: What is their personality type?

Question:

Define and understand the following terms: (i) Phylum (ii) Class (iii) Family (iv) Order (v) Genus

Answer:

(i) Phylum: A phylum is a taxonomic rank used in the biological classification of living organisms. It is typically the highest-level taxonomic rank in the classification of organisms, and is usually used to group organisms into larger taxonomic groups that have a common ancestor.

(ii) Class: A class is a taxonomic rank used in the biological classification of living organisms. It is typically the second-highest taxonomic rank in the classification of organisms, and is usually used to group organisms into larger taxonomic groups that share common characteristics.

(iii) Family: A family is a taxonomic rank used in the biological classification of living organisms. It is typically the third-highest taxonomic rank in the classification of organisms, and is usually used to group organisms into larger taxonomic groups that share common characteristics.

(iv) Order: An order is a taxonomic rank used in the biological classification of living organisms. It is typically the fourth-highest taxonomic rank in the classification of organisms, and is usually used to group organisms into larger taxonomic groups that share common characteristics.

(v) Genus: A genus is a taxonomic rank used in the biological classification of living organisms. It is typically the fifth-highest taxonomic rank in the classification of organisms, and is usually used to group organisms into larger taxonomic groups that share common characteristics.

Question:

Why are the classification systems changing every now and then?

Answer:

  1. First, it is important to understand why classification systems are needed. Classification systems are used to organize and categorize items based on their characteristics and features.

  2. Classification systems are constantly changing due to advancements in technology, changes in the environment, and new discoveries.

  3. For example, new species of animals and plants are discovered every day, so the classification systems must be updated to include these new species.

  4. Additionally, changes in the environment can affect the characteristics of existing species, requiring the classification systems to be modified to reflect those changes.

  5. Finally, advances in technology allow us to better understand the characteristics of different species, which can lead to changes in the classification systems.

In conclusion, classification systems are constantly changing due to advances in technology, changes in the environment, and new discoveries.

Question:

What do we learn from identification of individuals and populations?

Answer:

  1. Identification of individuals and populations can provide important information about the characteristics of a group or individual, such as their genetic makeup, behavior, and environment.

  2. By understanding the characteristics of an individual or population, researchers can better understand how different factors can affect the health and development of that individual or population.

  3. Identification of individuals and populations can also help researchers to identify trends in health and development, and to better understand the causes of certain diseases or conditions.

  4. Finally, identification of individuals and populations can help to inform public health policies and interventions, as well as to identify and target specific populations that may be at risk for certain health conditions.

Question:

Given below is the scientific name of Mango. Identify the correctly written name. Mangifera Indica or Mangifera indica?

Answer:

Mangifera indica. The scientific name of Mango is written using the correct capitalization of the genus, which is Mangifera, and the species, which is indica.

Question:

Define a taxon. Give some examples of taxa at different hierarchical levels?

Answer:

Answer: A taxon is a group of organisms that are classified together and given a unique name. Examples of taxa at different hierarchical levels include:

Kingdom: Animalia, Plantae, Fungi

Phylum: Chordata, Arthropoda, Mollusca

Class: Mammalia, Aves, Reptilia

Order: Primates, Carnivora, Cetacea

Family: Felidae, Canidae, Ursidae

Genus: Panthera, Canis, Ursus

Species: Panthera leo, Canis lupus, Ursus arctos

Question:

Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.

Answer:

  1. Kingdom: Plant - Flower; Animal - Mammal
  2. Phylum: Plant - Angiosperms; Animal - Chordata
  3. Class: Plant - Magnoliopsida; Animal - Mammalia
  4. Order: Plant - Rosales; Animal - Carnivora
  5. Family: Plant - Rosaceae; Animal - Felidae
  6. Genus: Plant - Rosa; Animal - Panthera
  7. Species: Plant - Rosa Canina; Animal - Panthera Tigris

Question:

Try to collect all the currently accepted meanings for the word species. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand?

Answer:

  1. Research the current accepted meanings for the word species.

  2. Discuss with your teacher the meaning of species in regards to higher plants and animals, and bacteria.

  3. Ask your teacher to explain the differences between the two, and how they are classified.

  4. Make notes of your teacher’s explanations and any additional information they provide.

  5. Summarize your findings and discuss any further questions you may have.

01 The Living World

02 Biological Classification

03 Plant Kingdom

04 Animal Kingdom

05 Morphology of Flowering Plants

06 Anatomy of Flowering Plants

07 Structural Organization in Animals

08 Cell

09 Biomolecules

10 Cell Cycle and Cell Division

11 Transport in Plants

12 Mineral Nutrition

13 Photosynthesis in Higher Plants

14 Respiration in Plants

15 Plant Growth and Development

16 Digestion and Absorption

17 Breathing and Exchange of Gases

18 Body Fluids and Circulation

19 Excretory Products and their Elimination

20 Locomotion and Movement

21 Neural Control and Coordination

22 Chemical Control and Integration