Answer: b) controlling the amount of air entering the combustion tube
The rate of a reaction when using a Bunsen burner is changed by modifying the temperature of the flame.
In this type of burner, the temperature of the flame is modified by controlling the amount of air available for the flame. More air allowed will result in a hotter flame. This is achieved by turning the collar around the air holes.
Answer: option C) cowpox and smallpox are caused by the same virus
Explanation:
Cowpox is a skin disease that affects cattle. It is caused by an Orthopoxvirus, with lesions occurring principally on the udder and teats of the animals.
Human infection may occur from touching infected cows, and thus giving immunity to smallpox (an acute infection caused by the same poxyvirus, in HUMANS)
So, Jenner's successful use was because cowpox and smallpox are caused by the same virus
Skeletal muscle is: ( c. is attached to bone via ligaments).
Answer:
Merkel’s disks: glabrous
Explanation:
Merkel's disks are nerve endings consisting of axonal branches that end in flat expansions and are implicated in the sensation of touch and pressure. Each of the nerve endings is associated with specialized epithelial cells. They can be found in the basal layers of the epidermis just above the basement membrane surface and are associated with rounded elevations of thick epidermis in the hairy skin. In addition, it is important to note that Merkel Disks are found only in glabrous skin and detect skin deflection.
