Q: You are presented with the question "What can recognize cancer cells as foreign to the body?" and the following answer choices: - electromagnetic energy - viruses - the immune system - bacteria - Allergies - Microscope - the colon - turn to a doctor Now knowing that antigens are molecules that the immune system recognizes as foreign to the body and antigens are expressed by cancer cells, choose the best answer.
A: the immune system

Q: You are presented with the question "What are invertebrates such as common garden pests with shells?" and the following answer choices: - graptolites - homogenous - mollusks - animals - micorbes - insects - gardeners - spores Now knowing that mollusks are invertebrates such as the common snail and slugs Slugs, a common Garden pest, are snails without a shell, choose the best answer.
A: mollusks

Q: You are presented with the question "what reduces greenhouse effect?" and the following answer choices: - Fully cooking the oysters - Something made from fermented ricce - fuel - reusing materials - gas - some electricity production - evaporative cooling - cells Now knowing that biofuel is used to produce electricity by burning and biofuels can reduce the greenhouse effect, choose the best answer.
A: some electricity production

Q: You are presented with the question "What releases oxygen during the day but not during the night?" and the following answer choices: - elephants - dogs - hydrocarbons - blue pine - Conifers - vegetation - humans - Fuel cells Now knowing that plants release oxygen during the day but not during the night and plants include blue pine, hemlock, spruce and oak, choose the best answer.
A: blue pine