Answer: The correct answer is -
D) in a host, it is capable of reproduction.
Explanation:
Virus can be described as a microscopic, infective, non living agent that typically possesses genetic material (DNA or RNA) that is surrounded by a proteinaceous coat (capsid).
It can not replicate by its own and thus it uses host machinery for replication. In other words, it multiplies within host organism. This is the reason that it can be called as living.
Thus, option D) is the right answer.
Ribosomes are involved in the protein synthesis
Answer:
D; Rock B has a fine grainy texture and small crystals.
Explanation:
The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis.
Answer:
Excitement
Explanation:
Sympathetic nervous system is a type of autonomic nervous system that acts as an emergency system of the body.
Sympathetic nervous system prepares the body during fight and flight response. The energy is put out in this system and protects the body from the injury. During excitement the heart speeds up, blood pressure increases and more energy is available to the body. Hence, excitement is the characteristic of sympathetic division of nervous system.
Thus, the correct answer is option (b).