Already have an account? Get multiple benefits of using own account!
Login in your account..!
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Hydrophily - Cross-pollination
All hydrophytes are not necessarily pollinated by water. In fact most of the aquatic plant are anemophilous, e.g. Alisma, Nymphaea. Like anemophilous plants floral envelops are highly reduced or absent in hydrophilous plants. Hydrophily may involve underwater pollination referred to as hyphydrophily, e.g., Ceratophyllum, Majus, and Zostera. A unique example of this type is Zostera mariana (a submerged marine perennial) in which pollen grains are long (up to 250pm) and needle-like resembling pollen tubes. Because of the specific gravity of this pollen they freely float at any depth, and when they come in contact with the stigma they coil around it. In some taxa ephydrophily operates. In these plants pollination is brought about at the surface of water.
The classical example is the submerged dioecious plant, Vallisneria. The male and female flowers are produced under water but on maturity the males get detached from the stalk and float on the surface while the female flowers attached to thin, spirally coiled, long, slender stalks are brought to the surface at the time of pollination. Pollination is achieved through water currents when male flowers come in contact with pistillate flowers. After pollination the flowers are dragged down to the bottom by the recoiling of the stalk. The fruits thus develop under water.
What are the types of digestion and of digestive system of platyhelminthes? Flatworms have incomplete digestive systems and they show intracellular and extracellular complement
Determine the architecture of cell There are over 200 types of cells in the human body, which are assembled into a variety of tissues, such as, the epithelia, connective tissue
The Features of Retrograde Peri-Implantitis include: - Periapical Bone loss without gingival inflammation. - Microflora consisting mainly of streptococci and nonmotile organ
Epididymitis Acute epididymitis in men less than 35 years old is usually caused by C. trachomatis or, less frequently, N. gonorrhoeae. Older men or those who have had urinary
What is the acrosome of the sperm cell? How is it formed? The acrosome is a structure that has a great number of digestive enzymes, it is located in the anterior end of the spe
information on climbing beans
how many grams of table sugar would you need to dissolved in water to produce 0.75 liters of a 0:25 molar acqeous solution of table sugar?
Headache Associated with Neurological Diseases Headache is a symptom of many nervous system disorders, usually resulting from the distortion of pain sensitive structures. Commo
Erythrocytic cycle The cycle that takes place in the body of man who is considered as secondary host is called the erythrocytic cycle. The first stage of the cycle begins
Q. Why is the endocrine system considered one of the integrative systems of the body? What is the other physiological system that also has this function? The endocrine system i
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd