Adult echinoderms have radial symmetry, and echinoderms are represented by the starfish. Given these facts, adult starfish have what among the following options: - a cuticle - plankton - whales - sensory neurons - layers of fat - radial symmetry - kinetic energy - adults
radial symmetry

(Question)
Treating water is used to remove harmful substances before drinking, and chlorine bleach is ideal for treating water. Given these facts, what removes harmful substances from water before drinking among the following options: - Calcium carbonate - evaporation - circulatory systems - sugar - chlorine bleach - one celled organisms - glass - cyanide
(Answer)
chlorine bleach

Ques: Harming an animal species causes that animal 's population to decrease, and studies of island populations have shown that extinction rates increase as area decreases. Given these facts, what to an animal species causes increase in extinction rates among the following options: - promoting - Pesticides - viruses - saving - harming - helping - wind - chickenpox
Ans: harming

(Q).
Lipids may consist of fatty acids alone, or they may contain other molecules as well, and bacteria are capable of growth on fatty acids and lipids. Given these facts, what can bacteria grow on among the following options: - fatty acids - swamp vegetation - Most plants - vinegar - amino acids - calories - protein - loose dirt
(A).
fatty acids

Ques:Damming a river can cause a lake to form, and the dam also generates electricity. Given these facts, what can cause a lake to form among the following options: - Something that generates electricity - water and minerals - rivers and streams - fissures of hot, acidic water - dividing into two parts - it flows to a lower level - a hydraulic system - changing the phase

Ans:Something that generates electricity

Ques: HIV infects and destroys helper T cells, and hIV, the human immunodeficiency virus, is a retrovirus. Given these facts, what does the human immunodeficiency virus destroy among the following options: - B cells - bacteria - helper T cells - animals - epidermis and dermis - critical organs - an organism's body - cancer cells
Ans:
helper T cells