Answer:
D. Trees grow back after a forest fire.
Answer:
This disorder may reduce the number of muscle cells and thus affects the muscle mass
Explanation:
During aging, it has been shown that there is a reduction in the number of muscle cells which are replaced by connective tissue and adipose cells. In consequence, it is expected that this type of disorder associated with faulty cell cycle regulation may cause a decrease in muscle mass
Explanation:
Kornberg performed the experiment to identify the molecules which could be able to replicate the DNA. He used a bacterial strain and bacteriophage which could infect the bacteria by incorporating its DNA.
He was able to detect an enzyme which cold assemble all the molecules to form a new DNA strand and named the enzyme as DNA polymerase.
This DNA polymerase can replicate biologically active DNA in which biologically active means that a biological active progeny DNA of phage was which is very accurate and is viable is produced by the bacteria using the enzyme DNA polymerase.
Answer:
Chemical bond
Explanation:
A chemical bond is the force of attraction that keeps the atoms or ions together in a molecule or compound. when a bond is formed the energy is stored in it and the similar amount of energy is required to break that bond.
The bond which is formed by the sharing of electrons is called as covalent bond. In covalent bond the atoms which have partially filled valence shell are combined to fulfill their valence shell (Duplet and Octet rule) to obtain stability. The force of attraction is created between the shared electrons and nucleus of each bonded atom in covalent bond.
The bond which is formed by complete transfer of electron is known as ionic bond. In ionic bond the donor atom donate its electron to acceptor atom to obtain two or eight electrons in their valence shells. The electrostatic force between opposite charges binds the two atoms in ionic bond.
