Burning wood is used to produce heat, and birch trees are deciduous and the wood burns hot and fast, as if soaked with oil or kerosene. Given these facts, birch trees are wood that are used to produce what among the following options: - sweets - ice - water - energy - heat - food - sugar - paper
heat

(Question)
Some arthropods have special excretory structures, and arthropods contain jointed appendages. Given these facts, some animals with jointed what have special excretory structures among the following options: - skin - appendages - they bend - eyes - muscles - sensory neurons - organ - insects
(Answer)
appendages

Ques: Lung cancer is most often caused by exposure to tobacco smoke, and smoke Tobacco smoke , whether directly or passively inhaled, has been shown to worsen asthma. Given these facts, what can be caused by direct or passive inhalation among the following options: - skin grafts - prolonged thirst - science - Toxicity - lung cancer - negative - friction - craters
Ans: lung cancer

(Q).
Photosynthesis means producers convert from carbon dioxide, water, and solar energy into carbohydrates for themselves, and green plants are producers . Given these facts, photosynthesis is when what converts from carbon dioxide, water and solar energy into carbohydrates among the following options: - plants - reproduction - fish - making - cells - Light - mitosis - photons
(A).
plants

Ques:Gravity pulls objects towards planets, and by the simplest definition, a planet is a large object that orbits a star. Given these facts, what pulls objects towards large objects that orbit stars among the following options: - planets - wind - sun's heat - dust - gravity - asteroids - speed - forces

Ans:gravity

Question: Healing requires rest, and healing and cell regeneration follows. Given these facts, what requires rest among the following options: - kinetic energy - amphibians - all animals - watching tv - oxygen - most organisms - Time and energy - cell regeneration
Answer:
cell regeneration