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Meghna Thapar 5 years, 4 months ago
The scientific naming of an organism is called nomenclature. The system of scientific naming or nomenclature we use today was introduced by Carolus Linnaeus in the eighteenth century. In Binomial nomenclature, the first name is the generic name beginning with a capital letter whereas the second name is the species name which begins with a small letter. Example – <i>Homo</i> <i>sapiens</i> where <i>Homo</i> is a genus name and <i>sapiens</i> is a species name.
Certain conventions are followed while writing the scientific names:
1. The name of the genus begins with a capital letter.
2. The name of the species begins with a small letter.
3. When printed, the scientific name is given in italics.
4. When written by hand, the genus name and the species name have to be underlined separately.
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Yogita Ingle 5 years, 5 months ago
• Euglenoids (such as <i>Euglena</i>) are unicellular protists commonly found in fresh water.
• Instead of the cell wall, a protein-rich cell membrane known as pellicle is present.
• They bear two flagella on the anterior end of the body.
• A small light sensitive eye spot is present.
• They contain photosynthetic pigments such as chlorophyll and can thus prepare their own food. However, in the absence of light, they behave similarly to heterotrophs by capturing other small aquatic organisms.
• They have both plant and animal-like features, which makes them difficult to classify and hence they are called as connecting link between plants and animals.
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Yogita Ingle 5 years, 5 months ago
(a) The knowledge gained through systematics is assembled for use in the field of medicine, agriculture, forestry and industries.
(b) It gives an idea about the organic diversity, its origin and evolution.
(c) helps in identification of crop pests and in solving the problem of many epidemic diseases.
(d) It helps in finding out new food resources such as fishes, arthropods, algae et
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Gaurav Seth 5 years, 5 months ago
The cells usually have the same composition and the are made of similar molecules. All the molecules together in a particular fashion build up different cell organelle with specific functions. The constituents remain the same but the outcome or final product, function and purpose changes. Hence, properties of the cell organelles are not always found in the constituents
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Yogita Ingle 5 years, 5 months ago
Taxonomy is a science that deals with naming, describing and classification of all living organisms including plants. Classification is based on behavioral, genetic and biochemical variations. Characterization, identification, and classification are the processes of taxonomy.Organisms are classified into similar categories namely kingdom, phylum, class, order, family, genus and species.
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Yogita Ingle 5 years, 5 months ago
'Diatomaceous earth' is the accumulation of large deposits of diatoms that forms a siliceous covering extending for several 100 m formed in billions of years. The material obtained from these deposits is used in polishing and filtration of oils and syrups.
Gaurav Seth 5 years, 5 months ago
'Diatomaceous earth' is the accumulation of large deposits of diatoms that forms a siliceous covering extending for several 100 m formed in billions of years. The material obtained from these deposits is used in polishing and filtration of oils and syrups.
Posted by Honey Yadav 5 years, 5 months ago
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Aanaya Sharma 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
Ctenophores are organisms that show biradial symmetry. Biradial symmetry is basically a mixture of bilateral and radial symmetry. In this type of symmetry, the body components are arranged with similar parts on either side of the central axis, and each of the four sides of the body is identical to the opposite side but it is different from the adjacent side.
So, the correct answer is 'Ctenophora'.
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Yogita Ingle 5 years, 5 months ago
Mesosomes are essential infoldings of the cell membrane, a unique characteristic of prokaryotic cells.
Gaurav Seth 5 years, 5 months ago
Mesosome is a convoluted membranous structure formed in a prokaryotic cell by the invagination of the plasma membrane. Its functions are as follows:
(1) These extensions help in the synthesis of the cell wall and replication of DNA. They also help in the equal distribution of chromosomes into the daughter cells.
(2) It also increases the surface area of the plasma membrane to carry out various enzymatic activities.
(3) It helps in secretion processes as well as in bacterial respiration.
Posted by Anushka ?? 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
- Primary and Secondary Growth: The mitotic divisions in meristematic cells at the root and shoot apex hikes the length of the plant. This is called as Primary Growth while Secondary meristem which results in an increased diameter of the plant known as Secondary Growth.
- Vegetative Growth: The growth in plants before flowering is known as vegetative growth and includes the formation of leaves, branches, and stems.
- Reproductive Growth: In this stage, the plants begin to flower which is a reproductive member of the plant.
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Posted by Anushka ?? 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Growth is defined as an irreversible constant increase in the size of an organ or even an individual cell. Put differently, growth is the most fundamental characteristics of living bodies accompanied by various metabolic processes that take place at the cost of energy. T
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Yogita Ingle 5 years, 5 months ago
- ICBN - Book of rules of nomenclature
- Collection of rules regarding scientific nomenclature of plants is known as ICBN
- ICBN was firstly proposed by Sprague, Hitchcock, Green (1930).
- ICBN was first accepted in 1961.
- 12th International congress, Leningrade, revised ICBN in 1975.
Posted by Kratika Mistry 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
we know that 1 inch= 2.54 cm
therefore to convert 7.82 into cm we need to multiply it with 2.84 ....
i.e., 7.82*2.54
= 19.8628
=19.9 cm (since the question has only 3 significant figures)
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Yogita Ingle 5 years, 5 months ago
Totipotency is the ability of living cells to form the whole organism unless and until they have become extremely specialized
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