Polarity of a Water Molecule. Water (H2O) is polar because of the bent shape of the molecule. The shape means most of the negative charge from the oxygen on side of the molecule and the positive charge of the hydrogen atoms is on the other side of the molecule. This is an example of polar covalent chemical bonding.
The correct answer is (d) It is smaller and does not give shape to the animal cell.
Animal cells have smaller vacuoles as compare to that of plant cell. It does not decides the shape of the of the animal cell. The main function of vacuoles in animal cell is endocytosis and exocytosis. They store the waste material. In plant cell the vacuoles cover almost 90% of the space and decides the shape of the plant cell as they are filled with water. This helps the plant cell to maintain turgor pressure.
Answer:
1a. Sewage is a liquid byproduct or waste that is carried through a system for treatment.
1b. Local wildlife and such would begin to die and dissipate and the rivers water, untreated would become unviable.
Answer:
C. Diabetics will have ample supplies of insulin that are produced by bacteria.
Explanation:
The technology of recombinant DNA has allowed scientists to introduce the human insulin gene into E.coli bacteria. E. coli are thus turned into "biological factories" that produce large quantities of human insulin, which can be easily purified and used as medicine for diabetics.
There are many more examples of DNA recombinant technology in human medicine, such as the production of recombinant human growth hormone (hGH) also in E. coli that is injected in individuals who don't produce enough hGH naturally, or even the production of vaccines by inserting antigen-coding DNA into a cell, purifying it and later injecting it into individuals to stimulate immunization.
Answer:
Men express all the X-linked genes present in their genome.
Explanation:
Human males have one copy of X and one copy of Y chromosomes. They express all the alleles present on their X chromosome irrespective of its dominant or recessive nature. This occurs because males do not have a second copy of the X chromosome to carry another allele for the same gene. Color blindness is caused by a recessive allele present on the X chromosome. Males carrying one copy of this allele exhibit the disease while females need two copies of the allele of color blindness to express the disease. Therefore, males are more frequently affected by this disease.
