It's depends on the size of molecule. big ones cannot pass the membrane while smaller molecules can.
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.
In Bryophytes, the sporophyte is dependent on the larger gametophyte, whereas, in Angiosperm and Gymnosperms, the gametophyte generation is dependent on the larger sporophyte generation.
<h3>Difference between gametophyte and sporophyte.</h3>
- The gametophyte is the haploid(n) state in the life cycle whereas the sporophyte is the diploid(2n) state in the life cycle.
- Gametophyte leads to gamete formation whereas sporophyte leads to the formation of spores.
- Spore formation takes place post meiosis whereas gamete formation either occurs directly or through mitosis.
- The meiospore grows to develop into the gametophyte. The zygote grows to produce sporophytes
- The cells in sporophytes have two genomes or possess two sets of chromosomes. The cells of the gametophyte have a single genome or produce one set of chromosomes.
To learn more about Gametophytes and sporophytes,
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Answer: Homeostasis
Explanation: The process of homeostasis is when self-regulation occurs in order to keep balance while adapting to changes.
Production of ATP in the absence of oxygen is called anearobic respiration. Under anaerobic respiration,two molecules of ATP is produced from one molecule of glucose. These ATP are used for energy production by the contracting muscles.
