<u>Answer</u>:
All statements describe advantages of models.
<u>Explanation</u>:
Models are the representative of the real world. A model system can provide information of the reactions going on inside a living system. A model should provide the following advantages which are: it should be easy to culture in lab., it should have a short life cycle, it should be inexpensive to operate, it should be easily genetically manipulated, it should be a representative of the original population, I should provide accurate result which might happen in the original population and it should provide economically important results etc. Model can include an organism or it can be a Computer based simulation.
Short For 
It Contains Genes
Temperate phages incorporate their DNA into their hosts' DNA. This is known as lysogenic phase. But, in this case, the host cells are not lysed, and therefore, a plaque is not formed.
A. males rarely participate in infant care
Answer: Improving food storage facilities
Explanation:
