<span>Lactase persistence, the ability to digest the milk sugar lactose in adulthood, is highly associated with a T allele situated 13,910 bp upstream from the actual lactase gene in Europeans. The frequency of this allele rose rapidly in Europe after transition from hunter–gatherer to agriculturalist lifestyles and the introduction of milkable domestic species from Anatolia some 8000 years ago. Here we first introduce the archaeological and historic background of early farming life in Europe, then summarize what is known of the physiological and genetic mechanisms of lactase persistence. Finally, we compile the evidence for a co-evolutionary process between dairying culture and lactase persistence. We describe the different hypotheses on how this allele spread over Europe and the main evolutionary forces shaping this process. We also summarize three different computer simulation approaches, which offer a means of developing a coherent and integrated understanding of the process of spread of lactase persistence and dairying.</span>
The correct answer would be C. I hope this helps you! <3
In the ecosystems of the world, there are many evolutionary finds that scientist have been exploring for centuries. In the marine ecosystem, plankton are a form of microevolution. They also migrate, known as vertical migration. This can affect the ecosystem in that during this migration, the heterotrophs consume various micro-organisms.
Answer:
The bubbles contain <u><em>oxygen</em></u>. This happens due to <u><em>photosynthesis</em></u>.
Explanation:
In photosynthesis of submerse water plants, oxygen emission occurs in form of bubbles which are released from the stomata. Usually the oxygen discharge is in form of regular bubble series. As the light levels are increased there is an increase in oxygen (bubble) production from photosynthesis of the plant.
<em>Hope this helps.</em>
