Jika sentriol hanya terdapat dibsel hewan, bagaimana sel tumbuhan membelah diri?
Answer (4)
The answer is Africa because our most recent ancestors (certain monkeys) lived there and we found early human remains in Africa. Hope this helps because the other answer is incorrect ignore the other answer
Scientists believe early human beings may have originated in Africa, supported by fossil evidence, genetic diversity, and the Out of Africa theory suggesting human evolution began on the continent.
Scientists widely believe that early human beings may have originated in Africa. The Out of Africa theory , also known as the recent African origin of modern humans, is a leading concept in human evolution. It is supported by a wealth of evidence, including fossil discoveries of hominid species, such as Ardipithecus and Australopithecus , which are found in Africa and date back millions of years.
Genetic studies have revealed that the highest genetic diversity among modern humans is found in African populations, indicating a common African ancestry. This genetic diversity, coupled with archaeological findings, provides strong support for the idea that early human populations emerged in Africa before gradually spreading to other parts of the world, giving rise to the diverse human populations we see today.
Learn more about Australopithecus here:
brainly.com/question/33881860
#SPJ12
Scientists believe early human beings originated in Africa, supported by fossil evidence, genetics, and migration theories. The 'Out of Africa' theory posits that modern humans evolved there before spreading globally. This understanding highlights Africa's critical role in human evolution.
;
Jawaban:Meskipun sentriol hanya ada pada sel hewan, sel tumbuhan tetap bisa membelah diri karena mereka menggunakan struktur lain untuk membentuk benang spindel (spindle fibers) saat pembelahan.Penjelasan:Sentriol adalah organel yang membantu membentuk benang spindel, yaitu serat yang menarik kromosom ke kutub sel saat pembelahan.Sel tumbuhan tidak memiliki sentriol, tapi tetap bisa membentuk benang spindel karena memiliki mikrotubulus yang diorganisasi oleh struktur lain, seperti MTOC (Microtubule Organizing Center).Jadi, bagaimana sel tumbuhan membelah diri?Saat membelah, sel tumbuhan membentuk benang spindel tanpa bantuan sentriol, menggunakan tubulin (protein penyusun mikrotubulus) yang dirakit oleh MTOC. Setelah kromosom dipisahkan, sel tumbuhan membentuk lempeng sel (cell plate) di tengah sel sebagai cikal bakal dinding sel baru.Walaupun tidak punya sentriol seperti sel hewan, sel tumbuhan tetap dapat membelah diri dengan mekanisme alternatif menggunakan MTOC dan mikrotubulus.semoga membantu!
