The major organ systems are formed, the circulatory and urinary systems are operating, and the fetus weighs about a half ounce. What stage of pregnancy is described?

First Trimester stage of Pregnancy

Explanation:

The first 3 months of pregnancy is called the First Trimester.

This stage is the most critical stage as there is a lesser chance of miscarriage after getting past this stage and the major organ system are formed. The baby’s brain isn’t fully developed yet and the sex is still unknown at this stage. The baby also weighs less due to the underdevelopment.

answer: 2

explanation:

yes

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation: