The answer is C barriers around mating
Answer:
Option (4) Second gap, is the correct answer.
Explanation:
G2 phase is the third phase of inter-phase. Second gap is also called G2 phase. It is a phase of the cell cycle which comes before the prophase stage of mitosis. In this phase, proteins are synthesized by the cell and increase occurs in the size of protein. In this phase, cell size is also increased and the cell is ready for mitosis.
Answer:
Protists are unicellular eukaryotes which show both plant and animal characters and these are considered as a bridge between plants and animals.
Explanation:
Protists are single-celled life forms and are eukaryotic organisms. Some of the protists like euglena shows both plant and animal characteristics. Protists are important in the following aspects -
- These are a good source of food for many animals. For example phytoplankton is the major source of food for whales. Zooplanktons also serve a good source of food for many aquatic organisms. These organisms often serve as the foundation of the food chain.
- By doing photosynthesis they also used to be beneficial in the balance of ecosystem.
- Some protists are also used as biofuel.
- They often show symbiotic relations with other organisms.
Answer:
Vagus nerve.
Explanation:
Vagus nerve is the tenth cranial nerve and largest among all the cranial nerves. This nerve transmits information to or from the surface of brain to the tissue or organ.
Vagus nerve is responsible for regulation of various functions like sweating, blood pressure, digestion, peristalsis and cardiac rhythmicity. Cranial nerve innervates in different system of body like digestion, blood pressure and cardiac rhythm.
Primarily the pharynx, the trachea and bronchi.
