When a pigment molecule in a light-harvesting complex absorbs a photon of light, While returning to its ground state, the electron transfers some of the energy from its excited state to an electron in a nearby pigment molecule.
- It takes a photon of light energy some distance before it reaches a pigment molecule like chlorophyll.
- An electron in the chlorophyll is "activated" by the photon. The energy imparted to the electron then moves from one pigment molecule to another until it reaches the reaction center, a pair of chlorophyll a molecules.
- An electron in the reaction center is then excited by this energy, causing it to break loose and travel to the primary electron acceptor.
- Therefore, it is said that the reaction center "donates" one electron to the main electron acceptor.
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Answer:
D-C-B-A
Explanation:
Oldest crust on the bottom
Answer:
All living things contain carbon in some form. Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates. Carbon's molecular structure allows it to bond in many different ways and with many different elements.
Explanation:
Answer:
Answered below
Explanation:
Primary succession occurs in an environment that is not habitable and is newly formed. Pioneer organisms are organisms which start to colonize these environments for the first time.
Secondary succession on the other hand is an ecological succession taking place in an environment or ecosystem that was disrupted but is then recolonized by other organisms.
Hippos are being endangered mainly because the poachers hunt them for their meat and their ivory teeth
