A large cloud of gas (hydrogen) and dust a nebula begins to collapse
The collapsing cloud begins to spin
The spinning collapsing cloud flattens into a rotating disk
Material in the disk begins to accumulate in the center
As the material coalesces in center, it becomes dense, compresses, and heats up.
More and more material coalesces to form a protostar.
The protostar continuse to accomulate material from the surronding disk and grow.
Eventually, the protostar becomes massive enough, dense enough and hot enough to cause the process of nuclear fusion to begin.
Nuclear Fussion isotops of hydrogen atoms (deuterium, tritium) combine to form helium atoms, energy, and subatomic particles.
Once nuclear fusion begins the protostar's “ignition” to nuclear fusion creates a solar wind that drives remaining gas and dust to the outer parts of the disk.
Then the young star stops accumulating material.
Passive transport uses no energy, so an example of that would be diffusion. So your answer would be D, diffusion.
The Calvin Cycle of photosynthesis begins when carbon dioxide reacts with RuBP, which is a 5-carbon carbohydrate. The enzyme called enzyme called Rubisco joins the carbon dioxide and RuBP. So the answer to your question would be D. carbon dioxide is attached to RuBP
Answer;
-Central conic vision
Explanation;
-Central vision is when our eyes focus straight ahead, allowing us to drive, read, and see details sharply.
-Central vision only covers about three degrees of our visual field, but it allows us to make very important judgments like estimating distance and understanding details in the path ahead.
Our sharpest, clearest vision is called central conic and is only about 3 to 5 degrees. This is our most focused vision where we can identify details and color
