Are secreted by cells infected with viruses, alerting neighboring cells and protecting them from becoming infected.
a. complement system globulins
b. interferons
c. granzymes
d. interleukins

The correct answer will be option B (Interferons).

Explanation:

The innate immune response to viral infection begins with the recognition of pathogen which starts viral host response in organism.

After detection of viral infection cell produces type I interferon's, the protein molecule which interfere with the proliferation of viral cells.

Interferon's provide resistance to viral infection by :

1. Binding to IFN-α/β receptors which activate JAK/STAT pathway.

2. Production of enzymes which leads to the degradation of viral RNA.

3. Induction of ds-RNA-dependent kinase which inactivates the synthesis of proteins.

4. Binding to Natural killer cells which induces lytic activity, killing viral infected cells.

Thus, option B-interferon is the correct answer.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.