Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
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!
In certain instances differences in the morphology of genitalia between species make it impossible for normal mating to occur, and sympatric species tend to remain isolated. When there is no correspondence between the male and female external genitalia for copulation to occur, the members belonging to different species are reprod;ctively isolated. When interspecific crosses occur between individuals having no exact correspondence in their genitalia, it resulted in the death of copulating pairs. Isects and snails are usually quoted as examples of such fatal ratings which occur "due to mechanical differences in their genitalia. It must alao be stated that differences in cogulatory organs, in many instances, have not proved to be a barrier for ihterbreeding. Breeding between dogs belonging to different races is an often cited example.
Mechanical isolation appears to play a more important role in the speciation of plants. Since many plants are aided by insects and birds in cross pollination, a morphological compatibility is required between the plants and the pollinating agents. Further, queen bees with their long mouth parts pollinate the nector producing species of Pedicularis and the other species of the plants are pollinated sternotribically or nototribically.
Accumulation of phenylalanine and its catabolic products leads to central nervous system damage. The extent of damage caused to the brain depends on the time at which the insult oc
Direction of flow--either towards or away from the transducer (positive or negative Doppler shifts). Timing-instantaneous velocity and direction of flow throughout the various
Q. What are the main causes of the loss of biological diversity nowadays? The largest dangers to the biological diversity today are the action of humans. The major of them is t
Q. How to measure Blood Pressure? With the onset of exercise, the resistance to blood flow through contracting muscles decreases significantly and results in a fall in the peri
What is Active site Active site : The site on the surface of an enzyme to which substrate or substrates bind.
Is there interphase again between meiosis I and meiosis II? There is no interphase nor DNA duplication among the divisions of meiosis. Only a short interval called diakinesis h
Which of the following defines why the vast majority of segregation errors in human patients include the two sex chromosomes (XXY, XO, XYY) or chromosome 21 (triple 21)? A. Th
Explain about the Protein Isolates? Before we begin our discussion on protein isolates, let us first get to know how protein concentrates differ from isolates. Basically, the t
Q. Why does the ingestion of alcohol increase diuresis? Alcohol inhibits the secretion of ADH that is antidiuretic hormone by the pituitary that is why when it is drunk to exce
Define Precautions for Determination of Haemoglobin Content in Blood 1. Potassium cyanide is highly toxic and hence drabkin's solution should not be pippeted by mouth. 2. Dr
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd