Planting trees has a positive impact on an ecosystem, and forest is largely pine trees. Given these facts, what has a positive impact on an ecosystem among the following options: - animals - Frogs. - chemical spills - Frogs - pines - parasites - pollution - mussels
pines

(Question)
Plants release oxygen during the day but not during the night, and algae produce oxygen during the day through photosynthesis. Given these facts, plants do what during the day but not during the night among the following options: - synthesize - absorb - photosynthesize - produce light - hydrate their cells - evaporation - plant - reproduce
(Answer)
photosynthesize

Ques: Electrical current running through a wire causes that wire to heat up, and high currents allow too much power, or electrical energy to be wasted in wires in the form of heat. Given these facts, how does energy get wasted in a wire among the following options: - carbon dioxide - It decreases - scattered light - it needs them - to move people - Evaporation - sweating - It heats up
Ans: It heats up

(Q).
Touch is the ability to sense pressure, and actually, touch is the sense of the skin. Given these facts, what does the skin sense among the following options: - pressure - Light - warmth - thirst - heat - sun's heat - heat or cold - heat energy
(A).
pressure

Ques:Aflashlight converts chemical energy into light energy, and ajoule is roughly the energy used by a flashlight turned on for one second. Given these facts, what is converted in a flashlight among the following options: - hydrogen and oxygen - adding heat - an electron lens - hydrogen to water - chemicals to light - batteries into solar - heat into light - chlorofluorocarbons

Ans:chemicals to light

Ques: HIV infects and destroys helper T cells, and helper T Cells Helper T cells are the brains behind immune response. Given these facts, what infects and destroys the brains behind immune response among the following options: - feet - p53 - cancer - HIV - acid - fungus - HPV - host
Ans:
HIV