Hello, I'm Angie and I'll be assisting you. I would appreciate it if you could thank me
Plants grow from areas of cells called meristem, which are the only places on the plant where new cells can be made.
On some kinds of plants, the meristem is arranged so that when the tip of a root - which contains the root apical meristem, from which new growth is initiated. If it is cut off, new roots are signaled to start growing from the side, an area called the lateral meristem. These kinds of plants don’t die if the tip is cut off - instead they grow new adventitious roots.
Roots of plants keeps on growing even after the evacuation of their tips it is on the grounds that the roots have meristematic cells which have the ability to grow. Meristematic cells are the totipotent cells which have the ability to form any kind of plant cell. These cells experience continuous division and create the new tip.
As auxin (plant growth hormone) is also available in tips of roots. When we cut it at that point no more extension will happen. Auxin here will induce now lateral growth of roots; just sidelong growth happens which will increment in flat development this procedure is utilized by gardeners.
Answer:
Dehydration reaction is the chemical reaction that links the MONOMERS together by removing a HYDROGEN ATOM form one monomer and an OH GROUP from a second molecule creating a COVALENT BOND between these molecules. The H ATOM and the OH GROUP will be bonded as well to form a water molecule. On the other hand, HYDROLYSIS is a chemical reaction that BREAK down POLYMERS introducing a water molecule and breaking the covalent between the monomers in the polymers.
Explanation:
Carbohydrates, proteins and nucleic acids are polymers of simpler sugars, amino acids and nucleotides respectively. Monomer molecules are joined together to form a polymer by dehydration reactions and a water molecule is released. On the other hand, hydrolytic reactions break down polymers into monomers by adding water molecules to them.
For example, a dehydration reaction joins two amino acids together by a peptide bond (a specific type of covalent bond that joins the amino acids) to form a dipeptide. During the reaction, one amino acid loses an H atom and the other loses its OH group to release a water molecule.
Breakdown of proteins into amino acid occurs by hydrolytic reactions in which water molecules are added to amino acids to breakdown the peptide bonds between them.
It is the developement of deuterostomes because the animals that are deuterostomes are including those of the phyla Echinodermata (e.g., starfish, sea urchins), Chordata (e.g., sea squirts, lancelets, and vertebrates), Chaetognatha (e.g., arrowworms), and Brachiopoda (e.g., lamp shells). This includes vertebrates, so yes that’s how sharks and starfish are related.
Answer;
-Protein ions
A resting axon's fluid interior has a mostly negative charge thanks to the presence of large protein ions.
Explanation;
-Intracellular and extracellular fluid of neurons contain various kinds of charged ions. These include sodium (Na+), potassium (K+), and chloride (Cl-). Additionally, these fluids contain many negatively charged protein molecules called anions (A-).
-The movement of such ions across neural membranes creates electrical activity. As ions move in and out of the cell, they bring their respective charges (either positive or negative) with them, thus influencing the voltage of cellular membranes.
-The protein molecules are large negatively charged proteins (anions) that are manufactured inside cells. They always remain inside the cell, as there are not membrane channels through which they can leave.Their charge contributes to the negative charge on the intracellular side of the membrane.
Answer:
Electrical gradient.
Explanation:
Ions DO NOT move in Ion channels by simple diffusion because most ion channels can be:
I) selective of ions pass through it.
II) operating on a "open and close" principle. Where it opens or close on its own accord OR does so ONLY when induced by a specific influence like change in voltage of ion channels.
IN ADDITION to the concentration gradient, ELECTRICAL GRADIENTS (change in membrane voltage) affects the movement of ions through ion channels
