Abreathing mask is used for keeping harmful particles from entering the respiratory system, and when inhaled, the particles lodge in the respiratory system, causing or aggravating health problems. Given these facts, a breathing mask keeps what from being inhaled and causing health problems among the following options: - cigarettes - harmful particles - chemical changes - influenza - oxygen particles - hydrogen and oxygen - air particles - atmosphere particles
harmful particles

(Question)
Aging is associated with the death of cells, and apoptosis means cell death. Given these facts, what is a natural part of aging among the following options: - Smoking - apoptosis - regeneration - illness - stimulation - cracking - Weight - firm skin
(Answer)
apoptosis

Ques: Asandbar is formed by water moving sediment downstream, and native species, such as cranes, use open water and barren sandbars for roosting at night. Given these facts, what happens on the formation where water moves sediment downstream among the following options: - mechanical - watershred - erosion - cranes roost - near the shoreline - streams. - it can be seen - swamp vegetation
Ans: cranes roost

(Q).
Breathing is when a gill converts from oxygen in water into oxygen in blood, and all fish have gills . Given these facts, what kind of animal breathes by converting oxygen in water into oxygen in blood among the following options: - clams - hawks - Fish - Whales - sharks - humans - Frogs - toads
(A).
Fish

Ques:Fungi have special structures for penetrating a host, and host tissue penetration occurs to the point of vascular connectivity. Given these facts, what can be part of invading a host among the following options: - It helps them survive - Something that causes allergies - Movement of an air mass - energy of moving objects - vascular conncectivity - harmful substances - Leptospirosis - competing for resources

Ans:vascular conncectivity

Some precipitation that falls on land may soak into the ground, becoming groundwater, and rain is only one kind of precipitation. Given these facts, what may soak into the ground, becoming groundwater among the following options: - h2o - wells - H 2 O - rain - H20 - blood - dust - river
rain