The answer is D: A gradual change in a species over time.
B. Four bonds
Carbon usually form covalent bond and can form ionic or other bonds sometimes. Carbon needs four electrons to be stable so the max of bonds a single carbon atom can form is four
The right answer is all of above.
The photocells or photoresist capture the photons and heat by transforming the photon energy into thermal energy.
Some molecules emit fluorescence when they absorb photons (the emitted light has wavelengths greater than that of the incident light).
Some molecules reflect the unabsorbed light after absorbing incident photon energy, such is the case of all colored materials.
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<span>Kenny's ideas and their acceptance were due to open mindedness. Elizabeth Kenny was born on 20th of September in the year 1880 and died on 30th of November in the year 1952. She was an unaccredited Australian nurse who treated polio in a different manner.</span>