Which molecules of the adaptive defense system provide humoral immunity by circulating freely in the blood and lymph

Antibody molecules

Explanation:

The immune system is categorised into two functional systems:

-Innate (natural) immune system and

-Acquired (adoptive) immune system.

The acquired immune system plays a major role against all the microbes capable of producing diseases and they are classified into two namely: Humoral and cell mediated immunity. The humoral immunity involves the B cells and the production of antibodies which are specific to invading antigens of disease causing organisms.

Antibodies are molecules of the adaptive defence system that provides humoral immunity by circulating freely in the blood and lymph.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge