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Answer 1

this is answer 9th ^
this is answer 7th=
External fertilization - this fertilization takes place outside the female body. ex= Aquatic animals.
Internal fertilization - this fertilization takes place inside the female body. ex= Mammals.

this is answer 8th =

Antibiotics, also called antibacterials, are a type of antimicrobial drug used in the treatment and prevention of bacterial infections. They may either kill or inhibit the growth of bacteria. 

precautions taken while using antibiotics -
1) antibiotics should be taken under the well qualified doctors.
2) intake of antibiotic should be completed as per the prescription given by the doctor.
3) antibiotic should be taken in the right amount and at the right time.

this is answer 9th