Briefly explain why viruses are not considered living organisms
What will be an ideal response?
Viruses lack the ability to metabolize. They rely entirely upon host cells for sources of energy, material, and organelles for duplicating themselves, a process called viral replication.
You might also like to view...
A student complains that it makes no sense to worry about coliform bacteria in water, since we naturally possess harmless coliforms in our intestines anyway. Why do regulatory agencies worry about coliform bacteria in water supplies, then?
A. The coliforms in our intestines can sometimes turn harmful, causing intestinal infections. We need to constantly be on guard against this happening. Coliforms in water might add to this potential problem. B. Not all coliforms are harmless and symbiotic with human beings. Some may carry genes/proteins that can make them dangerous to humans. It's best to keep coliforms OUT of our drinking water, since it's difficult to identify which ones might be harmless and which ones might be harmful. C. Regulatory agencies are worried that multiple types of coliforms in water might lead to greater antibiotic resistance in the bacterial populations. They try to keep them out of water to keep antibiotic resistance levels down. D. Regulatory agencies simply need something to do to justify their existence. There is no real danger from coliforms in water supplies.
A study of a cohort of 1,000 newborn animals
showed a death rate per individual in year one of 40 percent and a death rate per individual in year two of 80 percent. The quantity of survivors after two years is about
a. 120 b. 200 c. 320 d. 400 e. 1,000
Pain caused by a heart attack in men is often felt in the left shoulder and left arm. This phenomenon is known as ________ pain
Fill in the blank(s) with correct word
Random movement from a region with higher concentration to a region with lower concentration in the cell is called ________
Fill in the blank(s) with correct word