Viruses can’t survive without a host, they have to attach to a cell, unlike bacteria. Viruses are tinier than bacteria.
I believe the are recently new within the last 50 years i would imagine
Answer:
3. detection and response to stimuli
Explanation:
According to the given information, the thermoreceptors present in the skin layers of dogs and cats sense the change in the temperature of surroundings. When the temperature is reduced during a cold day, the sensory information about the same is sent to the central nervous system which in turn sends the motor information to the related muscles and glands.
One such response towards the lower temperature conditions is an expansion of their skin coat layers to insulate the underlying tissues from the cold surroundings. The same response (expansion of skin coat) is produced when these animals sense the danger of the presence of large predators around them.
The statement above is TRUE.
T cells are part of the white blood cells and function in the immune system response of the body. T cells function by destroying infected cells. T cells can be activated either by T cell receptor engagement with the antigen or by the signal that is produced by the receptor ligand interactions.
