Answer
Cellulose, lignin and suberin are the chemicals that provide rigidity to cell wall.
Explanation
In plant two type of growth occurs, primary and secondary growth. in primary growth when new cells are formed they are bounded by primary wall whose composition in mainly of cellulose. in secondary growth accumulation of lignin in secondary wall, suberin in cork cell wall and lignin in xylem cell wall occurs which provide rigidity.
Answer:
The second step in cellular respiration is called the Krebs cycle. The Krebs cycle uses pyruvic acid to create ATP, along with additional molecules like NADH, FADH2, and CO2. The NADH and FADH2 molecules are used during the final step of cellular respiration, while the CO2 is exhaled
Answer:
B- A food chain
Explanation:
This answer has been confirmed as correct and helpful
Answer and explanation;
-Mitosis is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
-In tissue culture, cancer cells are taken from a living organism and grown in a culture. Cancer cells grow at an uncontrolled rate. Cancer cells do not stop growing when they are touching; they continue growing. Cancer cells grow multiple layers thick. Cancer cell growth differs from normal cell growth and the number of mitotic divisions are unlimited.
-Producing three or more daughter cells instead of normal two is a mitotic error called tripolar mitosis or multipolar mitosis (direct cell triplication / multiplication). Other errors during mitosis can induce apoptosis (programmed cell death) or cause mutations. Certain types of cancer can arise from such mutations.
A) The active site of enzyme would not bind perfectly to this reactant molecule, it would be a sub optimal binding of enzyme molecule to reactant. However, since active site of the enzyme would be occupied, it would not be able to bind to correct substrate and do its function. Therefore, enzyme reaction would sub-optimal/slow or completely negative depending on the specificity of active site and its binding to the reactant molecule.