(Q).
Passive immunity lasts only as long as the antibodies survive in body fluids, and antibodies are administered to the patient in a process called passive immunization. Given these facts, how long can antibodies protect the body among the following options: - As long as antibodies survive - Slowing the transfer of heat - For a set time - by keeping them warm - it protects them - Into elderly years - As long as the human survives - A compound that donates proton
(A).
As long as antibodies survive

(Q).
Water causes refraction of light, and water is a compound of hydrogen and oxygen. Given these facts, what causes a refraction of light among the following options: - compound of hydrogen oxygen - focusing a lens - that material's properties - photosynthetic pigments? - oxidation reaction - a hemisphere is tilted away from the sun - sunlight beams - solid, liquid, gas
(A).
compound of hydrogen oxygen

(Q).
Secondary growth forms secondary vascular tissues and bark, and trees have the ability to undergo secondary growth and produce a woody body. Given these facts, what forms secondary vascular tissues and bark among the following options: - bamboo - humans - trees - ferns - fish - phytoplankton - plants - oak
(A).
trees