Please anyone send me the answer please
Answers
Answer:
14.
> The embryo is attatched to a disc like structure present on the uterine lining, called the placenta
> the placenta has many finger like projections called placental villi
> The nutrients diffuse from the mother's blood tho the baby's through the placental villi
15.
> Condoms: it is a contraceptive that works on the barrier method by providing a mechanical barrier from the male and female sex organs. it is the best contraceptive that also protects one from STD's
> Diaphragms: cervical diaphragms or caps are rubber caps that prevent the entry of the sperm into the uterus. it is a mechanical barrier
> Spermicidal Jellies: these are chemical creams or jellies that immobilizes the spermatozoa thus preventing conception. it is best paired with other contraceptives such as Diaphragms ad Lippe's Loop
16.
> Chromosomes the bodies that contain the genetic material, and are also called as the unit of inheritance.
> Usually sexually reproducing organisms are diploid, and to maintain the chromosome number, produce haploid gametes by meiosis or, reduction division
> the gametes contribute each half ( one from the father and one from the mother) upon fertilization and restore the diploid condition.
17.
> asexual method does not involve two parents, whereas sexual reproduction involves two parents.
> the species exhibiting sexual mode of reproduction tend to have a better chance of surviving on the long run.
> they produce variation in each progeny resulting a better chance of evolution.
Sorry, I'm not sure of the 13th question, hope this helps you.