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  • 1 answers

Kritika Trehan 8 years, 1 month ago

A planarian is one of many flatworms of the Turbellaria class.[1] It is also the common name for a member of the genus Planaria within the family Planariidae. Sometimes it also refers to the genus Dugesia.[2]

Planaria are common to many parts of the world, living in both saltwater and freshwater ponds and rivers. Some species are terrestrial and are found under logs, in or on the soil, and on plants in humid areas.

<a id="full-answer">Reproduction</a>

Despite the similarity of planarian sexual reproduction to that of other animals, planaria are capable of reproducing asexually by binary fission. This mechanism takes advantage of the planarians' extreme facility to regenerate lost sections of their bodies. Once a planarian is split in half – a division that can take place along any axis of its body: latitudinal, longitudinal or coronal – each section of the body activates special cells called neoblasts. Neoblasts are adult stem cells that can divide into new cell lineages that later specialize into all the body's tissues. Neoblasts at the site of the break begin generating new tissue to replace the structures each half has lost, which results in two new flatworms.

This process of reproducing via whole-body division can happen as a result of traumatic injury, or it can be initiated by the planarian itself as a normal process called transverse fission. When the planarian initiates the process, its body splits latitudinally between head and tail sections.

  • 6 answers

Rittika Rao 8 years, 1 month ago

It is a fruit

Sir Ap 8 years, 1 month ago

Fruit

Pankhudi Sarda 8 years, 1 month ago

It is a vegetable

Akshit Agrawal 8 years, 1 month ago

It can be fruit or a vegetable both because fruit we can eat without fried and vegetable can we make with frieying and the tamato we can eat with fried or without fried also so it can be fruit and vegetable both

Shanu C 8 years, 1 month ago

I think it is a fruit

Dipesh Kachhap 8 years, 1 month ago

It is a vegetable
  • 1 answers

Kishan Chaudhary 8 years, 1 month ago

Lycopene
  • 1 answers

Kartik Kumar 8 years, 1 month ago

Mine had d. Did X-ray's c VCR can call center console ccddde fun ggg fun fact run from G. Go get for rent from vet fun fact they Egg ending encouragement crunch cuteIDK Yb disrespectful I cry free Spanish USMC
  • 1 answers

Bose Einstein 8 years, 1 month ago

Organism which can't be seen with naked eyes only can be seen with microscope are called microorganisms.
  • 3 answers

Crazy Christaaaasssia??? 8 years, 1 month ago

Because some of them leds to various types of diseases

Gopinath Messi 8 years, 1 month ago

Microrganism are for for us because microganism cause desices for example fungi causes skin desices and virus causes viral desices so the microorganism are foe for us

Ankit Kumar Pal 8 years, 1 month ago

Microorganisms are foe because:- 1. They can cause disease in humans, plants and animals. 2. They can spoil the food.
  • 1 answers

Kritika Trehan 8 years, 1 month ago

CNG is made by compressing natural gas (which is mainly composed of methane, CH4), to less than 1 percent of the volume it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 20–25 MPa (2,900–3,600 psi), usually in cylindrical or spherical shapes.

  • 2 answers

Rittika Rao 8 years, 1 month ago

It is not flat but the one side of the Earth is flat

Pankhudi Sarda 8 years, 1 month ago

Earth is not flats it is sphere in shape
  • 1 answers

Sruti Banarjee 8 years, 1 month ago

Because it does not involve reproduction by any *** organs
  • 2 answers

Deeksha Singla 8 years, 1 month ago

The sound is energy that gives sensation of hearing . It is a stimulus in nature,which we perceive through ears

Chapati Hindustani Gamers 8 years, 1 month ago

The sensation filled by our year is called sound. Sound is a form of energy. Sound is that form of energy which make us hear
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  • 1 answers

Kritika Trehan 8 years, 1 month ago

In Earth's sky, the Sun, Moon, and stars appear to move from east to west because of the rotation of Earth (so-called diurnal motion).

The celestial objects appear to move across the sky from east to west because the earth is movimg about its axis from west to east. It takes nearly 24 hours for the earth to complete one revolution about its axis from west to east, but to us it appears that earth is stationary and various objects in space are moving from east to west.

 

  • 2 answers

Akshit Agrawal 8 years, 1 month ago

The number of oscillations per second is called frequency it is measured in hertz (HZ) that is called frequency not the bob is moving because we can find that word name is frequency and frequency means what how much time is pendulum taking to complete one oscillation, per second, so the number of oscillation per second is called frequency

Priyanshi Shukla 8 years, 1 month ago

The number of oscillation moved by a bob in one second is called frequency.
  • 3 answers

Deeksha Singla 8 years, 1 month ago

Inability to see The distant objects clearly,but the nearby objects are properly visible. This is known as myopia or nearsightedness

Akshit Agrawal 8 years, 1 month ago

For the problem of myopia we use diverging on concave lens it is a problem to able see nearby objects clearly but as a difficult to view distant objects this is my answer

Kritika Trehan 8 years, 1 month ago

Nearsightedness, or myopia, is the most common refractive error of the eye, and it has become more prevalent in recent years.

If you are nearsighted, you typically will have difficulty reading road signs and seeing distant objects clearly, but will be able to see well for close-up tasks such as reading and computer use.

Other signs and symptoms of myopia include squinting, eye strain and headaches. Feeling fatigued when driving or playing sports also can be a symptom of uncorrected nearsightedness.

  • 1 answers

Juhi Mittal 8 years, 1 month ago

S hand by laxmir Singh and manjed kour
  • 1 answers

Sruti Banarjee 8 years, 1 month ago

The science of the chemical elements and their laws and behaviour.
  • 1 answers

Sruti Banarjee 8 years, 1 month ago

To use a material in another state is called recycling
  • 1 answers

Shaurya Parashar 8 years, 1 month ago

Cycle handles, jewellery, scooter metal body etc.
  • 1 answers

Priyanshi Shukla 8 years, 1 month ago

2 vocal cords. And length is 20mm and 15 mm.
  • 1 answers

Punyata Jain 8 years, 1 month ago

Harmones are the chemical substances secreted by the glands of the body
  • 1 answers

Kritika Trehan 8 years, 1 month ago

The smoothness of the contacting surfaces influences friction. If  two surfaces are rough than if they are smooth, then is important to action witha greater force.  However, friction decreases with smoothness only to a degree; friction actually increases between two extremely smooth surfaces because of increased attractive electrostatic forces between their atoms. 

The factors that affect friction are as follows:-

  1. Surface on which the object is moved or the nature of the surface. i.e., rough surface, smooth surface, liquids etc
  2. The weight of the object or the amount of force on the surface by the object
  • 1 answers

Adheesh Trivedi 8 years, 1 month ago

Because of the molecular arangement of substance. When we zoom and see then we found that there are small - small ups and downs (molecules) causing friction.
  • 1 answers

Adheesh Trivedi 8 years, 1 month ago

the quantity of motion of a moving body, measured as a product of its mass and velocity.
  • 1 answers

Adheesh Trivedi 8 years, 1 month ago

Silica- sulphur and oxygen.
  • 1 answers

Adheesh Trivedi 8 years, 1 month ago

Because it cristallyse.
  • 2 answers

Sruti Banarjee 8 years, 1 month ago

A configuration of stars as seen from the earth is called constellation

Aryan Shaw 8 years, 1 month ago

Tumhara mundu
  • 1 answers

Divya Singh 8 years, 1 month ago

The characteristic of sound which distinguish between shrill sound and a soft sound is called pitch of sound
  • 2 answers

Adheesh Trivedi 8 years, 1 month ago

The to and fro motion of object

Priyanshi Shukla 8 years, 1 month ago

The to and fro of an object is called oscillation.

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