Answer and Explanation:
Answer:
In water molecules the oxygen atom attracts the negatively charged electrons more strongly than the hydrogen. This gives water an asymmetrical distribution of charge so that it is a polar molecule. ... Because the water molecules are small, many of them can surround one molecule of the solute and form hydrogen bonds.
Explanation:
Hydrogen bonds form between water molecules due to the charge instability within the molecule caused by the difference in electronegativity between the oxygen and hydrogen atoms. These bonds lead to the unique behavior of water in its various states.
Hydrogen bonds form between water molecules due to the polar nature of a water molecule. The oxygen atom in water molecules is more electronegative, pulling the shared electron closer resulting in a slight negative charge. Conversely, the hydrogen atoms end up with a slight positive charge. These charges lead to a hydrogen bond when the slightly positive hydrogen atom of one water molecule is attracted to the slightly negative oxygen atom of another water molecule.
Hydrogen bonds are weaker than covalent or ionic bonds, but their large numbers in water lead to significant effects. They help maintain the liquid state of water at room temperature, among other unique properties. Hydrogen bonds aren't exclusive to water molecules; they can also be observed in DNA structure and protein formation.
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b. spongy bone
c. bone marrow
d. periosteum
Answer:
He should get his mitochondrial haplotype sequenced, given the genetic variation in mitochondrial sequences compared to Y chromosomes.
Explanation:
A haplotype is a group of genes within an organism that was inherited together from a single parent. The word "haplotype" is derived from the word "haploid," which describes cells with only one set of chromosomes, and from the word "genotype," which refers to the genetic makeup of an organism.
Genetic variation is a term used to describe the variation in the DNA sequence in each of our genomes. Genetic variation is what makes us all unique, whether in terms of hair color, skin color or even the shape of our faces.
The typical metazoan mitochondrial DNA (mtDNA) is a double-stranded circular DNA molecule, which encodes a conserved set of 37 genes, including 13 protein-coding genes (PCGs) plus the two ribosomal RNA (rRNA) genes and 22 transfer RNA (tRNA) genes.
This, together with other special characteristics such as faster evolutionary rates than nuclear genes, presumed maternal inheritance, and absence of recombination makes mitochondrial DNAs one of the most popular targets for population genetics studies and accurate identification.
So in an enviroment the ones with a better adaptations will survive and pass on thier traits to the next generation. If a group of rabits have smaller feet and hop faster than other jack rabbits, then they will survive when chased by predators, and pass on thier traits, while others would get eaten. Over time the generations would have more rabbits with small feet and faster speeds until all rabbits have that trait.
The right option is; D
Establishment of communities in newly formed environments, such as volcanic lava flows or sand bars, is called primary succession. Development of new communities in disturbed environments, such as a burned or clear cut forest, is called secondary succession.
Primary succession is a type of ecological succession (changes) which occurs when communities of organisms establish new habitat in areas that are not capable of sustaining life due to various events such as volcanic lava flows, sand bars, oil spills, flooding, and landslides.
Secondary succession occurs when a smaller scale disturbance such as forest fire affect a stable existing ecosystem. Such disturbances support the reappearance of life because it does not remove all organisms and nutrients from the existing ecosystem.
Answer:
D. primary succession, secondary succession
Explanation: