Pollen is one-celled, or unicellular. It is used for reproduction in many types of plants. The bee is collecting nectar and, while doing that is transferring the very tiny pollen grains. The bee and the flowering plant are multicellular organisms, but they both have many things in common with the unicellular pollen What is one feature NOT shared by all three? All are made of one or more cells. The cells of each contain genetic material. The cells of each contain exactly the same parts.

The cells of each contain exactly the same parts.

Explanation:

Three different organisms are involved in this question viz: pollen, bee and flowering plant. According to the question, they are all living organisms, which means that they all contain one or more cells.

Although they all have cells but the cells of each does not contain exactly the same parts. Bee is an animal while pollen produced by the flowering plants are plants, hence, the parts/organelles contained in each cell of the mentioned organisms are mentioned.

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.