Which of the following are types of hereditary disorders? a. single-gene and chromosomal b. complex and duplex c. single-gene and duplex d. all of the above

For this question, it is a little tricky because of the presented options as answers. Single-gene and chromosomal are both types of hereditary disorders and also are one of the most common ones. Complex can be referred to as multifactorial and duplex might be referring to two single-genes, which might be something rare since it isn't an actual type of hereditary disorder. The answer to this question would most likely be A. single-gene and chromosomal. Choosing all of the above would also mean choosing what isn't true, so A. would be the most likely correct one.

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

Answer up to 6,000 fatal crashes a year;