These brain activity during stage 2 of sleep are called
sleep spindles. These are sudden bursts of brain activity from the reticular nucleus of the thalamus. In an EEG tracing, these look like fluctuations of voltage (see attached image). Sleep spindles do represent time periods wherein the thalamus inhibits conscious processing hence keeping the person in the asleep state.
26 as 52/2 =26
<span>I hope this helps!</span>
The correct answer to your question would be (4) - planting large expanses of one crop reduces the biodiversity of the area.
This should be evident - once you're planting only one crop in a certain area this necessarily decreases the biodiversity of that area. What is even more problematic with palm oil, however, is that it's often associate with the reduction of the natural habitat of different animals such as orangutans for example.
Answer:
directional selection, stabilizing selection
Explanation:
Directional selection is a type of natural selection that favors one extreme phenotype over other phenotypes, thereby modifying allele frequency in the direction of the favored phenotype. This type of positive selection is the main cause of phenotypic diversification. In the USA, the environment created a selection pressure that favored individuals that don't have the defective sickle-cell allele, thereby reducing its frequency in this population. Stabilizing selection, also known as balancing selection, is a type of natural selection where the most common phenotype is selected in the population, thus predominating in future generations. In equatorial Africa, the defective sickle-cell allele is present in a high frequency because individuals that are heterozygous for this allele are less susceptible to malaria, and therefore balancing selection should maintain this allele in the African population.
If both, Jenifer and Bill are the
carriers (have one allele for the achondroplasia) that theirs genotypes are Aa (A is dominant, a is recessive allele). In this case:
P: Aa x Aa
F: AA Aa Aa aa
This means that ¼ (25%) is the possibility for child to have achondroplasia.
Second case is if one of the parents have homozygous recessive genotype aa (not having allele for achondroplasia):
P1: Aa x aa
F: Aa Aa aa aa
This means that none of the child will inherit both alleles.