Answer:
The phopholipid tail is hydrophobic, since it is composed of two fatty acids.
Explanation:
Phospholipids are the fat molecules that mainly compose the cell membranes, forming a double layer.
The phospholipid molecules are formed by glycerol and phosphate group, located in the head, and a tail formed by fatty acids.
The pole formed by the phosphate group is hydrophilic —since it is polar in nature— while the end formed by fatty acids, the tail, is hydrophobic.
In the plasma membrane, the hydrophobic end is located towards the surface, while the hydrophilic portion is located in the center of the lipid bilayer.
Answer: The manubrium of the sternum and the calvicle.
Explanation: The sternocleidomastoid muscle originates from two locations: the manubrium of the sternum and the clavicle. It travels obliquely throughout the side of the neck and inserts on the mastoid system of the temporal bone of the skull.
Answer:
3-Changing one or more of the letters so that they spell a different word or no word at all
Explanation:
Genes are segments of the DNA that encodes the synthesis of protein. However, changes called MUTATION occurs to genes. MUTATION is any change in the nucleotide sequence of a gene caused by mistakes during replication or induced. Mutations, depending on how it occurs, results in differing effects on the protein. It can cause the production of a different protein, it can cause no protein to be formed due to the fact that a stop codon was encountered, it can also end up not changing the sequence that holds information about the protein.
According to the question, wooden tiles with letters represents the genes. These wooden tiles are combined by the students in such a way that the words produced represents the protein. A mutation, as defined earlier, means a change in one of the letters (genes) that will cause their combination to produce a word that is different from originally planned (different protein) or no word at all (no protein).
90 mammal species become extinct in the period 1901-2000 than became extinct in the period 1801-1900.
Extinction is a situation in which something no longer exists. Their can be many reasons associated like species have been hunted to the point of extinction, scarcity of food or natural disasters.
Their are two main types of extinction firstly Mass extinction that has occurred only five times in history. The other is Background extinctions which occurs over longer period of time and are considered important in natural extinction rate.
To learn more about Extinction , here
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