Answer:
D. Not all living things engage in the Krebs cycle
Explanation:
The Krebs Cycle, or also known as the citric acid cycle as it is the first substance to be formed during the cycle, is one of the stages of the cellular respiration process, only of aerobic organisms, occurring within the mitochondria of eukaryotic cells. The krebs cycle is the second stage of cellular respiration, also called the aerobic stage, as it occurs in the presence of oxygen. With this we can conclude that not all living beings engage in the Krebs cycle, since anaerobic organisms do not survive in the presence of oxygen.
Answer:
Specificity is the ability of an enzyme to choose exact substrate from a group of similar chemical molecules. The specificity is actually a molecular recognition mechanism and it operates through the structural and conformational complementarity between enzyme and substrate. Enzymes show different degrees of specificity towards their substrate.
Explanation:
The same principle apply to stereo microscopes, a 10X eye piece combined with a 4X objective lens will produce 40X magnification.
Answer:
C. sharp thorns
Explanation:
The plants stand still, are not very physically active, and seem to be on the menu of many animals. Precisely because they cannot win at the first sign of danger, one has developed other ways in which they can defend themselves from annoying and dangerous animals.
Some have developed long thorns that repel attackers. Some have poisons that are very strong and because of which animals do not think of trying to eat that plant, but the defense of some plants seems to be well thought out and ready for all forms of attack.
Carbon is four valence electrons they bond to the other carbon atoms