Answer:
Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.
Explanation:
Epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane.
Answer:
C
Explanation:
Saliva is through the mouth and is too break down food and has nothing to do with the respretory system
Hope this helps!
Answer: The correct option is B) They both obtain energy by consuming other organisms.
Herbivores are those organisms, which obtain energy by consuming plants ( primary producers). For- Example- Deer.
Carnivores are those animals, which obtain energy by consuming flesh of other animals. For example- Lion.
Since plants and animals both are organisms.
Thus, the correct answer is B)
Answer:
Two back-to-back phospholipid layers with the polar heads facing out on both sides
Explanation:
Phospholipids are made up of a head and two tails. The head can be described as a phosphate molecule that is water loving (hydrophilic) whereas fatty acids make up the two tails. The fatty acids repel water and hence are hydrophobic. The assembling of the phospholipids for the the formation of cell membrane depends on these hydrophilic and hydrophobic properties. The assembling of the phospholipids is in two layers. The phosphate head face outwards on both sides to attract water and the tails tend to hide from the water molecules by being composed in the layers of the head. this assembling is termed as the "self-assembly".