internal and external fish

External fertilisation takes place in animals like the fish and frog where the eggs are released from the body of the females into the water outside. Frog, Ovulation, Accumulation of Eggs in Uterus, Spawning and External fertilisation These eggs are then fertilised by ..

Pheretima posthuma is a common species of earthworm found living in burrows made in moist soil. It is nocturnal in habit. It has an elongated, cylindrical body which is metamerically segmented. Anteriorly the first segment is called peristomium. It encloses a mouth. Overhanging the mouth is a flesh..

When current is drawn from a cell, ions move within the cell from one electrode to another. The resistance offered by the electrodes and electrolytes to these, measure the internal resistance of the cell.The internal resistance of a cell depends on the distance between the plate..

Respiratory system - Lungs are the respiratory organs. The passage way for air is formed by external nostrils, pharynx, larynx, trachea and bronchi. Lungs contain large number of minute alveoli in which external respiration takes place. Surrounding the lungs and the heart is a t..

Photosynthesis is influenced by two categories of factors - external or environmental and internal or plant factors. According to the law of limiting factors, put forward by F.F.Blackman in 1905, photosynthesis is limited by the most limiting facto..

In multicellular organisms, the male gametes called the are produced by the male reproductive part and the female gametes called the eggs are produced by the female reproductive part. The male gamete of one individual fertilizes the female gamete of another individual to produce the zygote. Th..

. In fishes and amphibians fertilisation is external as the egg is fertilised outside the bod..

Two patterns of growth are commonly seen in animals regarding the proportion of the various body parts. Isometric growth: In this growth pattern, an organ grows at the same rate as the rest of the body. As the organism growths, the size remains proportional. Examples: Fish and Locust Allo..

Plant growth is influenced by a number of external and internal factor..

Types of Modems - Depending upon how your computer is configured and your preferences, you can have an external, internal or PC modem card. All three types work the same way, but each has its advantages and disadvantag..