Answer:
Too much light can make the specimen impossible to see under a microscope
Answer:
Nebula --> Protostar --> Supergiant --> Supernova --> neutron star
Explanation:
A high mass star starts as a big cloud of dust and gases. This cloud is called a nebula. When these clouds pick up some momentum, it condenses into a protostar.
The protostar will continue to condense because of its increasing gravity. The hydrogen atoms will start to collide and the pressure and temperature will trigger nuclear fusion. This is when the start will enter its main sequence where the outward force of nuclear fusion is balanced with its inward force. It will remain at this state until it runs out of hydrogen atoms.
When hydrogen stats to run out, the gravitational force will be greater than the force of nuclear fusion causing the core to shrink. Nuclear fusion then will start to occur outside the core and the star then expands into a Super giant.
The expansion of the star enables the star to create heavier elements like helium which then undergoes fusion itself and becomes a source of fuel for the star. When helium slowly depletes, it pulled into the core by gravity and all that is surrounding the core will explode , making it a super nova which marks the end of a star.
Two things can result from a supernova, a neutron star or a black hole. For bigger stars, the result would be a black hole. If the mass of the star was at least three times greater than our sun, then it will implode and become a black hole. If it is less, then the core would form a neutron star.
Cells have different shapes because they do different things. Each cell type has its own role to play in helping our bodies to work properly, and their shapes help them carry out these roles effectively. ... Animal cells come in many different shapes and sizes.
<u>Answer:</u>
A recombinant DNA molecule is produced by "genetic recombination laboratory methods".
<u>Explanation:</u>
The genetic recombination laboratory methods like molecular cloning is responsible for rDNA molecules formation. The steps involve pooling of genetic material from number of sources and generate very unique sequences which is not available in the genome.
The another method used for recombinant DNA molecule production is Polymerase chain reaction (PCR). This involves millions to billions of copies of a single DNA sample which allows easy access for scientists to take minute amount of DNA sample and make it to a appropriate large amount, as needed to follow deep analysis.