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Jassi Midha 6 years, 3 months ago
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Jassi Midha 6 years, 3 months ago
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Tannu Sharma 6 years, 4 months ago
Posted by Hk Suman 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
Metamerism is the phenomenon of having a linear series of body segments fundamentally similar in structure, though not all such structures are entirely alike in any single life form because some of them perform special functions.
Tejnath Maurya 6 years, 3 months ago
Posted by Hk Suman 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
All chordates have notochord present in some stage of life. The difference between vertebrates and non-vertebrates is as follows: In vertebrates the notochord is present in the embryonic stage. This is replaced by a vertebral column during the adult stages.
Posted by Gopy Amargarh 6 years, 4 months ago
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Jassi Midha 6 years, 3 months ago
Posted by Ankit Gupta 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
When a sperm fusses with egg it form a zygote sometime the zygote divide into two part hence, twins are born they are of two type identicle twins non identicle twin.
Posted by Akash Sarkar 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
Xylem and phloem are known as complex tissues as they are made up of more than one type of cells. These cells work in a coordinated manner, as a unit, to perform the various functions of the xylem and phloem. Tracheids are elongated, thick-walled dead cells with tapering ends.
Posted by Akash Sarkar 6 years, 4 months ago
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Shweta Dhama? 6 years, 4 months ago
Posted by Megha Kumari 6 years, 4 months ago
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Yogita Ingle 6 years, 3 months ago
Archaebacteria:
- Archaebacteria are called ancient bacteria.
- Individual archaebacterium is 0.1-15 μm in diameter.
- Archaebacteria are spheres, rods, plates, spiral, flat or square-shaped.
- Archaebacteria are simple in their organization.
- Cell wall is composed of pseudo peptidoglycans.
Eubacteria:
- Eubacteria are called true bacteria.
- Individual eubacterium is 0.5-5 μm in diameter.
- Eubacteria are cocci, bacilli, vibrio, rods, filaments or spirochetes in shape.
- Eubacteria are more complex than archaebacteria.
- Cell wall is composed of peptidoglycans with muramic acid.
Posted by Mohd Suhail 6 years, 4 months ago
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Tripti Rawat 6 years, 4 months ago
Pinnately compound leaf: In pinnately compound leaf a number of leaflets are present on a common axis. Example, neem leaves.
Palmately compound leaf: In palmately compound leaf number of leaflets are attached at the common point. Example, cotton leaves.
Yogita Ingle 6 years, 4 months ago
|
Pinnately Compound Leaves |
Palmately Compound Leaves |
|
1. Leaflets are present on a common axis, i.e. on a rachis. |
1. Leaflets are attached to the tip of the petiole. |
|
2. Example: Neem |
2. Example: Silk cotton |
Posted by Gaurav Pandey 6 years, 4 months ago
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Posted by Mamta Vishwakarma 6 years, 4 months ago
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Sia ? 6 years, 4 months ago
young stem means which is strong and having new leaves and old stem means which is week.
Posted by Onus Rajpurohit 6 years, 4 months ago
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Posted by B.L.G By Firuj 6 years, 4 months ago
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Posted by Sakshi Chaturvedi 6 years, 4 months ago
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Yogita Ingle 6 years, 4 months ago
Sieve tubes are elements of phloem. They are slender, tube-like structures composed of elongated thin-walled cells, placed end to end. The main function of sieve tubes is to transport sugars and nutrients up and down the plant.
Posted by Sachin Kumar 6 years, 4 months ago
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Posted by Ebenezer Lalringlien 6 years, 4 months ago
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Gaurav Seth 6 years, 4 months ago
Homopolymer has only one type of monomer repeating .'n' number of times. eg:-cellulose
Heteropolymer has two or more different type of monomers repeating a number of times in a particular sequence. eg:-proteins
Posted by Anvesh Good Luck 6 years, 4 months ago
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Mehak Gautam 6 years, 4 months ago
Posted by Jayakumaran Geetha 6 years, 4 months ago
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Meghna Thapar 5 years, 5 months ago
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells. Between G1 and S phase, three DNA damage checkpoints occur to ensure proper growth and synthesis of DNA prior to cell division. Damaged DNA during G1, before entry into S phase, and during S phase result in the expression of ATM/R protein. Interphase is divided into the first growth (G1), Synthesis (S), and the second growth (G2) phases (figure 1). The growth phases are, as you may have suspected, for the growth of the cell, during the synthesis phase the DNA replication occurs in preparation for the second growth phase.
Posted by Jayakumaran Geetha 6 years, 4 months ago
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Mehak Gautam 6 years, 4 months ago
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Pooja Soni 6 years, 3 months ago
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