Five Kingdom System and Binomial Nomenclature | Diversity in Living Organisms | Assessment | English | Grade 9

Who proposed the system of binomial nomenclature of organisms?

• Carolus Woese

• Carolus Linnaeus

• Carl Woese

• Robert Whittaker

Answer explanation

The binomial nomenclature is the system of giving scientific name to organisms. The binomial nomenclature was proposed by Carolus Linnaeus.

The branch of biology that identifies, describes, classifies and names the organism is called_______.

• Zoology

• Botany

• Taxonomy

• Ecology

Answer explanation

The branch of biology that identifies, describes, classifies and names the organism is called taxonomy.

What is called the unit of classification?

• Species

• Class

• Phylum

• Kingdom

Answer explanation

Whittaker classified all living organisms into five kingdoms: Monera, protista, fungi, plantae and animalia. In each kingdom, there are also organisms which are different from each other in terms of the specific characteristic. That’s why, each kingdom is again classified into subgroups. So on basis of characteristics, organisms are further divided into smaller groups at different levels and a hierarchy is developed. In which kingdom is at the upper most level and species is at the lowest level. In species there are organisms that are very similar to each other and can interbreed among themselves, that’s why the species cannot be divided further. Hence species is called a unit of classification.

The seven levels of classification, from most broad to most specific are:

• Kingdom, phylum, order, family, class, genus, species

• Kingdom, phylum, family, order, class, genus, species

• Kingdom, class, order, family, phylum, genus, species

• Kingdom, phylum, class, order, family, genus, species

Answer explanation

Whittaker classified all living organisms into five kingdoms: Monera, protista, fungi, plantae and animalia The kingdom is further divided into small groups: phylum, class, order, family, genus and species respectively. Where kingdom is the most broad level and species is the most specific level. We can remember these 7 levels of classification by remembering a simple sentence. "King Play Cricket On Fine Gray Sand." Where K is for kingdom, P is for phylum, C is for class, O is for order, F is for family, G is for genus and S is for Species.

Which of the following is the correct way of writing the scientific name of lion?

• 
• 
• 
• 

Answer explanation

There are four rules for writing scientific names. 1. The genus name must start with an Uppercase letter of English alphabet 2. Species name must start with a lowercase letter of english alphabet. 3. In printed form the scientific names are written in italics. 4. But when these are written by hand both the genus and the species are underlined separately.

If two organisms are in the same class, they must also be in the same:

• Species

• Genus

• Phylum

• Order

Answer explanation

The seven levels of classification are: kingdom, phylum, class, order, family, genus and species. If the organism has same genus than it not means that the organisms will also have same species. For example: tiger and lion both are of same genus Panthera, but their species are different. The species of tiger is tigris and the species of lion is leo. Therefore the scientific name of tiger is Panthera tigris and the scientific name of lion is Panthera leo. But the tiger and lion are of same kingdom, phylum, class, order, family, genus and different species. So if two organisms are of same class then their kingdom and phylum will be same. But they may not have same order, family, genus and species. Hence option 3 is the right answer.

Observe the following chart of classification of black bear. Which animal is closely related to the black bear?

• Fox

• White bear

• Panda

• Zebra

Answer explanation

In the given chart of classification of black bear, we can see that black bear and white bear are of same genus. While any other animal does not have the same genus as that of black bear. So we can say that black bear is closely related to the white bear.

Tags

NGSS.MS-LS4-2