<span>Damming a river has a variety of effects on the freshwater ecosystem, more than just altering the flow from A to B. Dams create calm bodies of water, changing overall temperature regimes and sediment transport, leading to conditions which tend to favour generalist species. Loss of specialist species, particularly endemics, changes the community structure and leads to biotic homogenization. A dam will withhold sediment in the reservoir, not just decreasing the amount of substrate available to local freshwater species, but even impacting diadromous, estuarine and marine species much further downstream. The competition between resident species for food and breeding sites will increase as damming isolates populations, and perhaps more importantly, damming completely restricts migratory fish species. Isolation may lead to decreases in genetic diversity and therefore puts species at greater risk from disease. All of these effects may be exacerbated by changes in the surrounding land use. Overall, damming river flow will lead to both a loss of native species, but also an increase in exotic species which are more likely to become established in degraded habitats. For this reason, dams are one of the greatest global threats to freshwater biodiversity.</span>
Explanation:
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The percentage of the white salamander population is 16%.
<h3>Hardy-Weinberg Equilibrium Equation</h3>
The genotypic frequencies within a population can be expressed by the binomial (p + q)² = 1, which can be developed and represented by the following equation:
p = frequency of the dominant allele;
q = frequency of the recessive allele;
p² = frequency of the zygous dominant genotype;
2pq = frequency of the heterozygous genotype;
q² = frequency of the zygous recessive genotype.
Also according to the equation presented (p² + 2pq + q² = 1), we will have the following distribution of genotypes:
- CC = 0.36 = 36%
- Cc = 0.48 = 48%
- cc = 0.16 = 16%
Learn more about recessive allele in brainly.com/question/844145
The answer to this question would be: <span>B) 5,400 J
</span>The question for this problem probably asking about the energy for the secondary consumer. In the energy pyramid, the total energy transferred will be only 10% of total energy received/provided. That means the 54,000J from primary will be decreased into 5,400J in the secondary and then into 540J into the tertiary.
Answer:
The cytoplasm divides in two
Explanation: