Hi there!
A prezygotic isolating mechanism is a mechanism that causes something to happen, not allowing the organisms to breed before fertilization. I'll explain each one for you.
A - That is postzygotic because the organisms were not stopped before fertilization. The result is a sterile organism.
B - Again, that is postzygotic because the organism was produced.
C - This is prezygotic! The sperm dying shows that something is in action to prevent fertilization, meaning that it cannot happen.
D - Fertilization was successful, so it is postzygotic.
ANSWER:
C - the sperm dies when it reaches the female tract
If you need help with any more problems, feel free to message me and I'd be more than happy to help you work through them and provide explanations.
Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
The medical term nasopharyngitis is used specifically to refer to the swelling of the nasal passages (the nose) and the back of the throat.
<h3>What is nasopharyngitis?</h3>
It is associated with the rhinopharynx or nasopharynx, which is the sector of the pharynx that is next to the nostrils and above the back of the throat.
It is an inflammatory condition or a disease that is caused by the action of a virus in the upper respiratory system.
Therefore, we can conclude that the medical term nasopharyngitis is used specifically to refer to the swelling of the nasal passages (the nose) and the back of the throat.
Learn more about nasopharyngitis here: brainly.com/question/3522051
When the change of temperature in a space is measured and can be controlled to get a preferred temperature.
Answer:
that aren't sex chromosomes ( dont know which one because there are not any answer choices)
Explanation:
The pipettes can basically be characterized into five grades. these grades includes the serological, disposable, repeat, single channel and multi-channel pipette. The guidelines for the usage of each of these pipettes differ. However, some instructions are common, such as the control of the flow of liquid. The index finger is used for the purpose of controlling the flow of the liquid from the pipette.
Hence, the answer is 'index finger'.
