Mitochondria and chloroplasts have quite a few more similarities with prokaryotic cells than eukaryotic cells like, the nuclear envelope is absent in prokaryotic cells and these organelles where in the eukaryotic cells it is present. These organelles have single circular chromosomes the same as prokaryotic cells where in eukaryotic cells they have multiple, linear which are wound on nucleosomes. The Golgi apparatus is present in eukaryotic cells and absent in prokaryotic cells and these organelles. The ribosomes for prokaryotic cells are relatively small like mitochondria and chloroplasts whereas they are relatively large in eukaryotic cells.
Here is a table explaining this information.
ª Certain parasites and anaerobic organisms lack mitochondria, having lost them either because high-energy compounds are available directly from the host cell, or because they cannot use the oxygen-dependant enzymatic pathways unique to mitochondria. One group of primitive eukaryotes lacks mitochondria, ER and Golgi body.
Perceptions task 2.
Two questions that science is currently addressing are:
That germ grabbing magnetic beads that can be pulled from the blood. This involves using a magnetic field to literally pull sepsis, which is a potentially lethal blood infection what can lead to multiple-organ failure, out of the blood. It works by using micron-sized magnetic beads to filter pathogens out of the blood of septic patents. The beads are coated with an antibody that binds to sepsis-causing bacteria or fungi mix with blood drawn from a patient. After the antibody-coated magnets have bound with the pathogens, they are pulled via a magnetic field into a saline solution that flows alongside the blood and sweeps them away. In tests using 10-20ml of blood 80 % of pathogens were removed.
The human race isn’t just upsetting the levels of carbon dioxide in the atmosphere but nitrogen as well. Although the burning of fossil fuels is known to release nitrogen oxides that can excessively fertilize ecosystems or react with other compounds to form smog and acid rain, researchers have had difficulty pinpointing the extent to which people have disrupted nitrogen levels in the atmosphere to investigate scientists from Brown University and from the University of Washington tested and ice core from Greenland which had trapped nitrate deposits over the past three centuries. They found that levels of rare nitrogen 15 isotope had plummeted over the past 150years when compared with the more common nitrogen 14.
Questions that science cannot yet answer.
A cure for cancer. In a couple of years of testing and producing new drugs that would help cure cancer they have still not found an actual cure that will kill the cancer cells and get rid of them forever I think they are very close maybe in about 5 to 10 years maybe they will. They have found ways to make cancer disappear but not all together.
Questions that science will never be able to answer.
How many planets are in the universe? With all the telescopes with higher magnification getting higher and higher eventually the human race will be able to answer how many planets are in the universe. And whether any of those planets are inhabited. They are able to recognise whether the planet is possible to inhabit life by recognising what gases are in that planets atmosphere.
How big the universe actually is because if they managed to build a space shuttle that could travel very far with human life on there how are they going to know that they have come to the end of the universe is there going to be a brick wall, if there is what is on the other side of that brick wall?
- New advances in the scientific community are made known to the scientific community by a research paper being written and then either being sent to be published in a journal or presented in a conference then it is either being checked by another scientist if sent to be published or the paper is published in the conference records then if the paper is correct the paper is published then other scientists repeat the experiment to check its validility.
- New scientific advances are made known to the public by the television on the new because if it’s a breakthrough then they want to let people know straight away.. they also use newspapers and certain scientific websites.
