Biology, 14.12.2020 22:50 coolkitty35
Shameeka is studying for an exam. She took the notes below about calcium and chlorine, which are known to form ionic bonds.
Calcium, which is a metal, donates 2 electrons to chlorine.
The individual calcium atoms become ions with a negative 2 charge.
The bond between calcium and chlorine makes the atoms stable.
Calcium and chlorine attract each other.
Answers: 3
Biology, 22.06.2019 18:30, tyshunstephens0
Which of the following are not matched correctly? cd8+: directly destroy infected or cancerous cells t reg cell: reduce the adaptive response once threat passes t l: activate cellular branch (cytotoxic t cells, macrophages, nk cells) t 2: stimulate b cells to make antibodies t (cd4+): mhc i
Answers: 3
Biology, 23.06.2019 00:30, koolbeast68
Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?
Answers: 1
Biology, 23.06.2019 00:30, cpcoolestkid4
Explain the purpose of a molecular clock and the properties that a section of protein must have to be used in this way.
Answers: 1
Shameeka is studying for an exam. She took the notes below about calcium and chlorine, which are kno...
Mathematics, 14.06.2020 22:57
Mathematics, 14.06.2020 22:57
History, 14.06.2020 22:57
Mathematics, 14.06.2020 22:57
Mathematics, 14.06.2020 22:57