What is the reason why there are so many organic compounds? a. organic compounds are produced by living things. b. unlike inorganic compounds, organic compounds can be cyclic. c. carbon atoms can form stable covalent bonds with other carbon atoms. d. organic compounds can be larger than inorganic compounds.

option A

Organic compounds are many because they are produced from living things.

Explanation:

Organic compounds are chemical compounds produced from living things that contains carbon and hydrogen atoms. Carbons can catenate that is they can bond and form chains with other atoms, they replicate and become many. This is why organic compounds are many due to the ability of carbon produced by livining things to form link,bond or catenate.

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus