Test: Scientific Nomenclature - Class 9 MCQ

Deductions from the information:
- Rice belongs to the genus Oryza and species sativa: The scientific name Oryza sativa indicates that rice belongs to the genus Oryza and species sativa. The binomial nomenclature system is used to classify and name organisms, and the scientific name provides information about the genus and species to which the organism belongs.
- Rice is a monocotyledon: While the information provided does not directly state that rice is a monocotyledon, it can be deduced. The genus Oryza belongs to the family Poaceae, which is a family of flowering plants known as grasses. Grasses are monocotyledonous plants, meaning they have a single embryonic leaf (cotyledon) in their seed.
- Rice gives a large amount of energy: The information provided does not give any direct information about the energy content of rice. While rice is a staple food in many cultures and provides carbohydrates that can be converted to energy by the body, the statement cannot be deduced solely from the scientific name.
- Rice is the principal cereal in many parts of India: The information provided does not mention anything about rice being the principal cereal in any specific region. While rice is widely consumed in many parts of India, this statement cannot be deduced from the scientific name alone.
Therefore, the correct deduction from the given information is that rice belongs to the genus Oryza and species sativa.

Binomial Nomenclature in Organisms
Binomial nomenclature is a system used to give scientific names to organisms. It was introduced by Carolus Linnaeus in the 18th century. In this system, each organism is given a unique two-part name, which consists of the genus and species names.
The two names given to an organism in binomial nomenclature are:
A: Genus and species names
- The genus name represents a group of closely related organisms that share common characteristics.
- It is always capitalized and italicized or underlined.
- For example, in Homo sapiens, "Homo" is the genus name.
- The species name represents a specific organism within the genus.
- It is always written in lowercase and italicized or underlined.
- For example, in Homo sapiens, "sapiens" is the species name.




Therefore, the correct answer is A: Genus and species names.

The question asks which of the following animals does not belong to the genus Panthera, which is the genus name for leopards. Let's analyze each option:
A: Rat - Rats do not belong to the genus Panthera. They belong to the genus Rattus.
B: Snow leopard - Snow leopards do belong to the genus Panthera. Their scientific name is Panthera uncia.
C: Tiger - Tigers also belong to the genus Panthera. Their scientific name is Panthera tigris.
D: Lion - Lions are also members of the genus Panthera. Their scientific name is Panthera leo.
From the above analysis, we can conclude that the animal that does not belong to the genus Panthera is the rat. Therefore, the correct answer is option A.
To summarize:
- Rat does not belong to the genus Panthera.
- Snow leopard, tiger, and lion all belong to the genus Panthera.

The names of which two taxa are used in binomial nomenclature?
In binomial nomenclature, the names of two taxa are used to classify and name organisms. These taxa are:
1. Genus: The first part of the binomial name represents the genus to which the organism belongs. The genus is a higher taxonomic rank that groups closely related species together. It is always capitalized and italicized (or underlined when handwritten).
2. Species: The second part of the binomial name represents the species within the genus. It is always written in lowercase and italicized (or underlined when handwritten).
For example, in the binomial name Homo sapiens, "Homo" represents the genus and "sapiens" represents the species.
Summary:
The two taxa used in binomial nomenclature are the genus and species. The genus represents a higher taxonomic rank, while the species represents a specific organism within that genus.

Explanation:
The scientific name of a species consists of two parts: the genus name and the species name. In the case of the frog, the scientific name is Rana tigrina.
- The genus name, Rana, indicates the generic name. It is a broader category that groups together similar species.
- The species name, tigrina, indicates the specific name. It identifies the particular species within the genus.
- Therefore, in this case, tigrina indicates the species name of the frog, Rana tigrina.
So, the correct answer is B: The species name.

Explanation:
When it comes to writing names in binomial nomenclature, there are specific rules that need to be followed. Let's break down each option and determine which one is correct.
A: The name of the species begins with a capital letter.
- This statement is incorrect. In binomial nomenclature, the name of the species always begins with a lowercase letter, not a capital letter.
B: When written by hand, the name of genus and species begins with small letters.
- This statement is incorrect. Whether written by hand or typed, the name of the genus always begins with a capital letter, while the name of the species begins with a lowercase letter.
C: When printed, the scientific name is given in italics.
- This statement is correct. In scientific writing, when the scientific name of a species is printed, it should be italicized. This helps to distinguish it from the surrounding text.
D: The name of the genus begins with a small letter.
- This statement is incorrect. The name of the genus always begins with a capital letter in binomial nomenclature.
Therefore, the correct rule of writing names in binomial nomenclature is that when printed, the scientific name is given in italics (Option C).

Binomial nomenclature for the scientific naming of organisms was developed by Carolus Linnaeus. This system provides distinct and proper scientific names to the variety of organisms. Each name has two parts, i.e., the first part comprises its generic names, while the second part is the specific epithet.

In his book Systema Naturae, Linnaeus proposed that there were three broad groups, called Kingdoms. These Kingdoms were Animals, Plants and Minerals.

Carolus Linnaeus introduced the binomial nomenclature system for naming organisms in a scientific way.

Binomial nomenclature cannot distinguish between members of a spcecies because we know that it is the fundamental category of taxonomic classification.So,We cannot distinguish between the members of species.