(Q).
Adult sponges are sessile, and sessile Attached permanently, immobile. Given these facts, what are immobile among the following options: - critical organs - all matter - land mammals - adult humans - gastropod shells - adult sponges - water molecules - an organism's body
(A).
adult sponges

(Q).
Chemical weathering causes iron in rock to oxidize, and also pyrite within the altered wall rock is oxidized to limonite, geothite and hematite. Given these facts, chemical weathering causes what to change to limonite among the following options: - pyrite - growth - Collagen - fibrous - cellulose - soil - cracks - calcite
(A).
pyrite

(Q).
Erosion causes a river to become deeper and wider, and clearing of land can lead to erosion of soil into the river. Given these facts, what makes a river wider among the following options: - rainfall - salinity - arteries - flow of electrons - Water expanding - Physical weathering - a hydraulic system - clearing land
(A).
clearing land