Phytoplankton are tiny microscopic plants algae<span> that form the base of the marine food chain. The most </span>important<span> living things on our green planet are single cell</span>algae<span>. And they are the most </span>important<span> because they produce oxygen, more oxygen than anything else does</span>
The correct answer is d. glucose.
Grapes contains sucrose which is made up of its monomers glucose and fructose. On mixing yeast with grapes, alcoholic fermentation occurs in which glucose is first converted into pyruvate. In the absence of oxygen (anoxygenic conditions), pyruvate can be converted into ethanol and carbon dioxide through the alcoholic fermentation by yeast. Thus, glucose is the source of carbon dioxide.
Answer:
The correct answer is option B. "A mutation occurred in a gene found in some fungi, and the enzyme produced is able to break down lignin".
Explanation:
The unique trait of expressing lignin peroxidase that some fungi have in order to break down lignin must have being the result of natural selection. Natural selection works under the premise of "survival of the fittest", where a spontaneous mutation gives an advantageous trait to an individual that makes it more likely to survive and reproduce. In this case breaking down lignin gives some fungi the advantage of being able to feed from wood.
Answer:
The correct answer is option e. "result in permanent activation of Ras".
Explanation:
Ras function is regulated by the GTP/GDP cycling rate, in a way that Ras is inhibited by the substrate GDP. Once Ras hydrolyzes GTP, GDP is produced and Ras is inhibited by GDP. A mutation that inhibits Ras from hydrolyzing GTP, would lock Ras in a permanently activated state because no GDP would be produced and there will be no substrate to inhibit Ras.