Causes of speciation
<span>Geographic isolation
In the fruit fly example, some fruit fly larvae were washed up on an island, and speciation started because populations were prevented from interbreeding by geographic isolation. Scientists think that geographic isolation is a common way for the process of speciation to begin: rivers change course, mountains rise, continents drift, organisms migrate, and what was once a continuous population is divided into two or more smaller populations.
</span>Reduction of gene flow
<span>However, speciation might also happen in a population with no specific extrinsic barrier to gene flow. Imagine a situation in which a population extends over a broad geographic range, and mating throughout the population is not random. Individuals in the far west would have zero chance of mating with individuals in the far eastern end of the range. So we have reduced gene flow, but not total isolation. This may or may not be sufficient to cause speciation. Speciation would probably also require different selective pressures at opposite ends of the range, which would alter gene frequencies in groups at different ends of the range so much that they would not be able to mate if they were reunited.</span>
Control group
Explanation:
Experiments are usually designed so that the differences between the experiment and control groups can be observed.
- The experimental group is the group that follows the details of the hypothesis where variables are changed to see their causes and effects.
- The control group is the standard by which the experimental group is compared with.
- The variables are being tested for in the experimental group to see how they are changing .
learn more:
Controlled experiment brainly.com/question/1621519
#learnwithBrainly
Answer: synthesize a pre-rRNA 45S (35S in yeast), which matures and will form the major RNA sections of the ribosome. RNA polymerase II synthesizes precursors of mRNAs and most snRNA and microRNAs. RNA polymerase III synthesizes tRNAs, rRNA 5S and other small RNAs found in the nucleus and cytosol.
Explanation:
Answer:
I think its B if I got it wrong at least I tried
Explanation:
have a good day
<span> Sexual reproduction is more likely to increase genetic diversity because every offspring has twice as much genetic material to pull from when being formed compared to the one set of genes in asexual reproduction. There is also the differences between mates that can increase genetic diversity as well if many different mates are mated with.
Asexual reproduction typically happens more quickly, however, because an asexually reproducing organism does not have to bother with finding a mate, courting and allowing time for the genetic material assimilate, they can just reproduce and all of their genes are utilized in the new organism rather than just half.
The whiptail lizard may reproduce either sexually or asexually depending on the environmental conditions.</span>
