<span>Epithelial tissues is a basic type tissue lining the cavities of blood vessels and organs. Squamos, Columnar and Cuboid are the three types of epithelial tissues. Secretion, absorption, transport and sensing are the chief roles of epithelial tissues.</span>
Answer:
Threonine has two chiral centers.
The correct options are c. carbon b and d. carbon c
Explanation:
Chiral centers are those that have four different groups of atoms bonded to it. Carbon a has three atoms of hydrogen attached to it so it can't be a chiral carbon. It isn't the carboxyl carbon either since it is double bonded to oxygen. And the amino nitrogen does not qualify anyway because it is bonded to three different groups of atoms, not four.
The ecosystem is very complex and simulations do not include all of the factors that may impact ecosystem processes.
Indigenous peoples are important in environmental considerations because:
a. their homelands contain natural habitats least disturbed by humans.
b. their homelands contain a huge proportion of earth's biodiversity.
c. their languages represent encoded knowledge of nature that is irreplaceable.
d. all of the above are correct.
D. seems to be the best answer.
