Ques: Echinoderms lack respiratory and excretory systems, and lung mechanics and gas exchange are topics during study of the respiratory system. Given these facts, what do Echinoderms lack among the following options: - Lungs - Mass - oxygen - eardrum - gills - ovaries - Organs - Bodies
Ans: Lungs

Ques: Athermal insulator slows the transfer of heat, and ice is a good thermal insulator. Given these facts, what slows the transfer of heat among the following options: - moss - coat - CFCs - UV - foil - fur - skin - ice
Ans: ice

Ques: Eating food that contains pesticides can have a negative impact on humans, and herbicides are the leading type of pesticides, in terms of both user expenditure and volumes used. Given these facts, what can have a negative impact on humans if contained in food they eat among the following options: - h2o - vitamins - toxins - bacteria - protein - contamination - Smoking - herbicide
Ans: herbicide

Ques: Agreenhouse is used to protect plants from the cold, and plants are very easily raised from seed, sown in a cold greenhouse from February to April. Given these facts, what does a greenhouse protect plants from to help them grow easily among the following options: - death - hotness - Winter - fronts - heat - drought - rain - chill
Ans:
chill