Answer:
Many plant crops need more phosphorus than is dissolved in the soil to grow optimally. In addition, crops are usually harvested and removed – leaving no decaying vegetation to replace phosphorus. Therefore, farmers replenish the phosphorus ‘pool’ by adding fertilisers or effluent to replace the phosphorus taken up by plants.
Explanation:
I would assume B low death rate since the birth rate is low and they live longer so they aren’t dying as fast
Answer:
c.Alleles
Explanation:
Genes are the hereditable units that transmit the information needed to specify traits (such as hair or eyes color), from parents to offspring, generation to generation. Genes are arranged in sequence in the chromosomes. A chromosome might contain hundreds of thousands of genes.
Each chromosome carries specific genes that code for specific proteins that have specific functions in the organisms. Each chromosome carries information to synthesize different proteins needed to accomplish a certain function. But not all chromosomes carry the same gene sequences. Only homologous chromosomes carry information for the same trait, but even this information is not necessarily the same. <u>They might have the same gene but in different alternatives. </u>
<u>Alleles are the different alternatives in which a gene might appear.</u> By the process of natural mutation, a gene might change into two or more alternative forms that are called alleles. <u>These alternative forms codify for the same trait expressing different phenotypes. </u>
In the exposed example, <em>alleles are responsible for the different phenotypes expressed by the girls. </em>The <em>alternative forms of the genes -the alleles- that codify or hair color and for eyes color, express either red or blonde hair, and either blue or brown eyes. </em>
The final genotype and phenotype depend on the gametes that merge to form the zygote, and hence the new organism.
Gamma rays<span> and beta particles are all </span>used<span> to treat internal organs. X-</span>rays<span> are produced by firing electrons at a metal target and </span>gamma rays<span> are emitted by the nucleus of radioactive atoms. </span>Gamma rays<span> are </span>used<span> to kill cancer cells, and to </span>medical<span> equipment and in radioactive tracers.</span>
