An alternation of generations for plants include a haploid gametophyte and a diploid sporophyte.
The best answer to the question 'What are the nonliving components of the environment that shape an ecosystem?' would be letter d. Abiotic factors are those components of the environment that are non-living or does not have life. All the other choices have life.
Answer:
Answer is B. It did not reflect the actual evolutionary relationships among organisms very well.
Explanation:
The five-kingdom system of classification was initiated or formed by Robert H. Whittaker in 1969. And it involved the Kingdoms monera, fungi, protista, animalia and plantae.
This classification system was regarded as not so good because of placement of some certain organisms. For example, in the classification system, unicellular algae were put under the kingdom protista, when other multicellular organisms like algae were being classified under the kingdom Plantae.
The noncyclic pathway is a FLOW of electrons from water, to photosystem II, to PHOTOSYSTEM I to NADPH. Energy is released as ELECTRONS move through the first electron transfer chain. This energy pumps HYDROGEN IONS into the thylakoid compartment, and then they power the formation of ATP as they flow back out. Sunlight provides the energy needed to keep this cycle going.
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- Luminous energy is trapped by chlorophyll in Photosystem II.
- When the pigment molecules absorb light, electrons provided by water molecules get in a higher energy level.
- The excited electrons go through the electron transport chain from Photosystem II to a less energetic level in photosystem I.
- <em>When the excited electrons leave photosystem II, they are replaced by new electrons extracted from the water molecules. </em>
- Luminous energy absorbed move the electrons from the photosystem I to another electron acceptor, from where they get transported again and used to produce NADPH molecules.
- <em>When electrons leave Photosystem I, they are replaced by new electrons coming from photosystem II. </em>
- When the water molecule breaks down, hydrogen ions remain in the thylakoid lumen, from where they are pumped to the stroma by the ATP synthase.
- The released energy is used to produce ATP molecules.
- Hydrogen ions go back from the stroma to the thylakoid compartment.
The final products are oxygen, ATP, and NADPH.
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