Many corals secrete an exoskeleton that builds up to become a coral reef, and coral reefs are made up of the accumulated exoskeletons of the coral polyp. Given these facts, what do coral polyps form among the following options: - lagoon  - graptolites  - a cuticle  - barnacles  - bioaerosols  - cave  - coral reef  - salt and water.
coral reef

Scraping oneself on a contaminated object may cause infection, and an abscess is an infected area swollen with pus. Given these facts, scraping oneself on a contaminated object may cause what among the following options: - an area wet with medicine  - a pill for health  - cause their death  - an area clean from bacteria  - fissures of hot, acidic water  - an area swollen with pus  - contamination  - harmful substances
an area swollen with pus

Sperm had to swim from male to female reproductive organs for fertilization, and sperm and eggs are cells known as gametes. Given these facts, what swims to female reproductive organs for fertilization among the following options: - barnacles  - alpacas  - fur seals  - male gametes  - A Greek letter  - eggs  - birds  - tadpoles

male gametes