A principal função dos métodos contraceptivos é evitar uma gravidez em período não adequado à vida de um casal. O esquema acima apresenta um desses métodos. Considerado como o mais eficaz dos métodos contraceptivos, o procedimento ilustrado atua (5 Pontos) evitando o contato do esperma com o canal vaginal. evitando que o embrião formado se implante no útero. impedindo a união entre os gametas masculino e feminino. impedindo a entrada dos espermatozoides no útero.

Sperm pass through the and connect to a short ejaculatory duct. vas deferens prostrates seminiferous tubules none of the above

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.