1. Passage of a sperm through the corona radiata of the oocyte.
2. Penetration of the zona pellucida.
3.Fusion of the plasma cell membranes of the oocyte and sperm. after fusion the sperm head and tail enters the oocyte but plasma membrane of sperm doesn't.
4. Completion of the second meiotic division of the oocyte. this creates female pronucleus and polar body 2.
5. Formation of the male pronucleus (nucleus of sperm enlarges)
6. Breakdown of the pronuclear membranes and restoration of diploid number of chromosomes.
The idea that males and females of approximately equal physical attractiveness are likely to select each other as partners refers to the Matching hypothesis.
In the field of social psychology, the idea that people are more likely to form successful relationships with and express liking for people whole level of physical attractiveness roughly equals their own.
A good example is. A man of average attractiveness goes on one date with an extremely attractive person, and then another with an average-looking person. He finds he likes the average-looking date more.
Answer:
it varies from country to country
Wastewater is water that contains the waste from homes and industries.
<h3>What is wastewater?</h3>
Wastewater refers to water that contains waste products. Waste water can also refer to water that have been used for several purposes and produced as a by-product.
The primary sources of waste water include:
- from homes
- from agricultural and farming activities
- and industries.
Therefore, it can be concluded that waste water is water that contains waste from homes and industries.
Learn more about wastewater at: brainly.com/question/25085634
¿What are invertebrates?
Invertebrates are unicellular or multicellular organisms that present a great variety of habits and morpho-functional patterns.
Which are classified into :-
Anthropods, molluscs, worms, echinoderms, coelenterates, and porifera.
I hope I've helped : )
