Answer:
The most appropriate answer would be C.electron carriers such as NADP⁺.
High energy electrons are transported through electron transport chain embedded in a thylakoid membrane in order to produce energy rich compounds such as ATP and NADPH.
It is also called as light dependent reaction of photosynthesis. It includes four major protein complexes: photosystem II, photosystem I, cytochrome b6f complex, and ATP synthase.
The electron first gets excited from chlorophyll a present in the reaction center (P₆₈₀ and P₇₀₀) of two photosystems (PS II and PS I) . The electron in PS II is replenished by photolysis of water.
Different electron carriers (such as plastoquinone, plastocyanin, pheophytin, chlorophyll A₀ etc) are present which help in transferring this high energy electron from one complex to another. NADP⁺ is the final acceptor of the electron and gets reduced to NADPH.
NADPH and ATP are then used in dark reaction in order to fix carbon into sugars.
Answer:
B. continent
Explanation:
All three of the other choices are used to classify biomes.
Answer: a. Measuring the amount of rain that falls in a 24-hour period in a rain gauge.
Answer:
The answer is<em> cooler, denser crust sinks into the mantle.</em>
Explanation:
We live on Earth's crust, its thinnest and outermost layer. This layer is made from many smaller pieces called tectonic plates. These plates are not immobile; they are constantly moving to get closer to or further from each other. One of the main driving forces for tectonic plates movement is slab pull. Not all plates have the same density or temperature; oceanic plates are usually denser and colder the continental ones. Slab pull occurs when these two plates come completely next to each other and the denser oceanic plate subducts the continental, which means that it starts sinking below it, towards the asthenosphere (upper mantle), so the correct answer is cooler, denser crust sinks into the mantle.
The type of proteins that can function as the chemical messengers or as the receptors in the plasma membrane is a communication proteins; option A.
Proteins are large macromolecules composed of chains of amino acid units linked together by peptide bonds.
Proteins serve various functions such as:
communication
transport
defensive
enzyme
Communication of proteins such as the hormones can be function as the chemical messengers or as receptors in the plasma membrane.
Proteins are made up of hundreds or the thousands of the smaller units called as amino acids, which are attached to one another in the long chains. There are about 20 different types of amino acids that can be combined to make a protein.
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