Answer:
a. Exoskeleton made of chitin
Explanation:
Arthropods are invertebrate animals with articulated locomotor organs, which is the main characteristic of this phylum. The articulated paws allow the animal to perform various movements, very well defined and elaborate. This feature gives these animals not only efficient locomotion, but also aids in their defense and food capture.
They have another striking feature as well, which is the diversely segmented body, but always covered by a chitin cuticle, which represents its exoskeleton. Some have a calcareous shell outside the chitinous exoskeleton, such as crustaceans.
Answer:
The correct answer is option d) "Only one of the two fusion proteins possesses a nuclear localization signal".
Explanation:
A nuclear localization signal or sequence (NLS) serves as an amino acidic tag that is recognized by the cell, and the cells responds by importing the protein into the nucleus. In this example a protein was divided into two segments and was used to generate two fusion proteins. Since only one of the two proteins was found in the nucleus, we can conclude that only one of the two fusion proteins possesses a nuclear localization signal.
The digestive system as it is the only system associated with consuming food.
Phagocytosis is to eating as pinocytosis is to drinking.
