How are complementary strands of dna held together?
a) with hydrogen bonds connecting complementary bases
b) with phosphodiester bonds connecting sugars and phosphate groups
c) with hydrogen bonds connecting complementary sugars
d) with ionic bonds between sugars and phosphate groups

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.

Be prepared.experiment breaking point of rubber bands measured in certain amount of temperature communication

that's all i luck!

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