Which of the following represent differences between growth of cell cultures containing cytoplasmic organelle disease versus genetic transmission of nuclear dna from parent to offspring?

i. meiosis maintains the genetic integrity of growing cell cultures, while mitosis arranges nuclear dna into a form which is transmissible to offspring.

ii. the process of arranging nuclear dna in preparation for transmission to offspring is a cyclical process, while the growth of cell cultures is carried out by a noncyclical process.

iii. growth of cell cultures requires transformation of diploid cells into haploid cells, while genetic transmission of nuclear dna to offspring requires transformation of haploid cells into diploid cells.

None of these.

Explanation:

(I) It is incorrect because mitosis is responsible for maintaining genetic integrity, and cell culture growth between daughter, and parent cell in a cell culture.

(II) It is incorrect because creation of gametes from the meiosis is a non-cyclical process, it happens one time, and ends in gametes creation such as ova, and sperm cell. On the other hand mitosis is a cyclic process.

(III) It is also incorrect because mitosis is a process which obtains cells with diploid no. of chromosomes, and in meiosis genetic transmission of DNA to offspring, the no. of chromosomes is reduced (diploid to haploid, not increasing).

from almost the creation of the first true maps of the earth, people started seeing how continents would be able to fit together.   in particular, people noticed that south america fits almost exactly into africa.

you should be aware that while world maps were around early in the 1600’s and better defined by the end of the 1700’s, those maps were not ‘public’ but were treated as state secrets.   and so it was not till much later that the broader ‘science’ community had access to good quality and accurate world maps.

get the whole story here…

it is now known that most of the major continental masses can be fit together in a jigsaw process.   in fact we now know that the continents were indeed once all joined together as one land mass – the supercontinent of pangaea.

if you look at most world maps you will ponder how this is evidence, as the continents really don’t appear to ‘fit’ together very well.   what you need to understand is that the vast majority of maps are drawn using a map projection that has the north and south poles (which are points) are a line the width of the map at the top and bottom.   this means that the map distorts the true shape of the earth’s land and oceans as you love closer to the poles.     some other map projections distort less, but have the map shape looking like segments of an orange.   see here for a range of map projections.   check out the way greenland changes size in each!

what is more remarkable, is the next piece of evidence when added to the shape of continents.

location of mountains and fossils

what is remarkable, when you reassemble all the continents together, the ancient mountain ranges (many now eroded to their cores) and the location of rock types and fossils all match up.

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