Answer:
A phospholipid
a. has both polar and nonpolar regions.
Explanation:
Phospholipids, as amphipathic molecules, consist of a glycerol molecule, two fatty acids, and a phosphate group that is modified by an alcohol. The phosphate group is the negatively-charged hydrophilic (water-loving) polar head, which face outward and are attracted to the intracellular and extracellular fluid. The fatty acids are the uncharged, hydrophobic (water-fearing) nonpolar tails, which face the inside, away from the water and meet in the inner region of the membrane.
Answer:
The correct option is D. 18 year old male
Explanation:
The epiphyseal plate can be described as a disc of cartilage that is required for the growth of bones. The epiphyseal plates get fused in females at a very early age, most probably between the ages of 13 to 15. In males, the epiphyseal plates fuse a litter later at about 15 to 18 years.
Hence, the presence of epiphyseal plates in the femur would prove that it was present in an 18-year-old male.
All the other options would be false because they won't contain an epiphyseal plate.
Beneficial mutations are more frequently fixed in large populations than in small ones, whereas deleterious mutations are more frequently eliminated.
Explanation:
An area where soil has eroded experience loss of nutrients. The topmost layer of soil is called the topsoil and is the most fertile. Soil erosion results in the loss of soil fertility and makes the land barren
The main cause of soil erosion is the removal of vegetation, which exposes the topsoil to water and wind. Wind and water are the main agents of soil erosion.
Water erosion can be sheet erosion, rill erosion, gully erosion or riparian erosion.
The altered protein affected the function of the cell membrane. The cell membrane which contain a bilayer control the movement of substance in and out of the cell and organelles. Due to this it is selective permeable to ion and organic molecules.
