Answer:
D. Sulfur
Explanation:
Electrons are filled in shells. Oxygen has a total of 8 electrons while sulfur has a total of 16 electrons. Out of the total eight electrons, the first shell has two electrons while six electrons are filled in the “s and p” orbits of the second shell giving the outer shell a configuration of "2s2, 2p4".
Likewise, out of the total 16 electrons of sulfur, the last 6 electrons are filled in "s" and "p" orbits of the third shell. Sulfur has a total of six electrons in its outer most shell "3s² 3p⁴". Since the electrons present in the outer most shell are available for chemical reactions and determine the chemical nature of the atom, oxygen and sulfur should exhibit the same chemical properties.
<u>Answer</u>:
Different types of magnifying technology like light microscopy and electron microscopy helped scientist to determine differences in the internal structures of plant and animal cells.
<u>Explanation</u>:
Human eyes can only see up to 1 mm in range. Plants and animal cells are very small which cannot be seen by the naked eye. For this reason, microscopes have been used to see enlarged structures of cells with the help of a compound microscope or electron microscope.
Light microscope can only magnify up to 1000x time to see the details of the cell but electron microscopes can magnify up to 100,000x times. The cells to be examined for the internal structures are cut into fine slices with the help of ultramicrotome and visualized under transformation or scanning electron microscope.
Answer: Is most likely to result from reduced ATP levels.
Explanation:
Dichlorodiphenyltrichloroethane (DDT) is a colorless, odorless, tasteless, crystalline compound. It is an organochloride. It is used as an insecticide. It is associated with damage of biodiversity and several human and animal health complications.
In human males DDT is associated with decrease in fertility. As it results in low sperm count, negatively affects the sperm motility and synthesis.
The uncoupling process will reduce ATP synthesis in the mitochondrial cells of the sperms. This may lead to low sperm motility in the vaginal canal of the female after the insemination process. Thus this will reduce the male fertility.
They help transmit information between cells of the brain and spinal cord. These are considered as essential fatty acids which are required for optimal health. Unfortunately, they cannot be synthesized in our body. It must be provided in our diet. They are also termed as polyunsaturated fatty acids. They have critical role in the maintenance of structural and functional integrity of the central nervous system. It is particularly important in the development of CNS during fetal life. This must be sustained during the infancy by giving the right and adequate nutrition. This essential fatty acids particularly helps in myelination, which allows conductions of nerve impulse to be fast through saltatory conduction.
