An autotroph is an example of a producer, something that builds its own nutrients from molecules such as carbon dioxide and water. In this case, the correct answer is d. A hawthorne tree uses the process of photosynthesis to produce nutrients such as simple sugars which can then be used to build organic molecules inside the plant to fuel respiration and other biochemical processes.
Answer: Option E) polar
Amino acid-derived and peptide hormones are unable to diffuse across a cell membrane because they are polar
Explanation:
Amino acid-derived and peptide hormones such as serotonin, epinephrine, dopamine etc, are unable to diffuse across a cell membrane because they consist of several repeating units of amino acids with positively charged or negatively charged side chains.
Thus, the side chains make these hormones water-loving (hydrophilic), and impassable to the hydrophobic layer of the cell membrane.
Answer:
C
Explanation:
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Answer:
because our solar-system's vantage point is inside one of the galaxy's spiral arms. When we observe the Milky Way, we usually are looking toward the center of the galaxy, about 25,000 light-years away.
The crust is always in motion due to convection. Cold magma will sink, while hot magma will rise, which, in return, will move the crust. Diverging plate boundaries, (the mid-ocean trench) are plates which are moving away from one another. This will create a trench, where an upwelling of magma will seep through. Subduction is when one plate is submerged underneath another. A trench occurs in a subduction.