Microbial cells first evolved on Earth approximately ________ billion years ago
A) 1.6 to 1.8
B) 3.8 to 3.9
C) 5.4 to 5.6
D) 7.0 to 7.2
Answer: B
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Which of the following represents a difference between eccrine sweat glands and apocrine sweat glands?
a) Eccrine sweat glands are located deeper in the dermis than apocrine sweat glands. b) Eccrine sweat glands use exocytosis to make secretions, while apocrine sweat glands do not. c) Eccrine sweat glands begin to function at puberty, while apocrine sweat glands function throughout life. d) The secretions of apocrine sweat glands contain more fat and protein than do the secretions of eccrine glands.
Insulin directly affects the
a. secretion of saliva. b. storage of proteins. c. secretion of pancreatic juices. d. metabolism of sugar. e. utilization of fat reserves.
Which endocrine gland is directly responsible for the secretion of the glucocorticoid cortisol?
A. adrenal cortex B. hypothalamus C. thyroid gland D. adrenal medulla E. anterior pituitary
Fructose and galactose both have six carbon atoms, twelve hydrogen atoms and six oxygen atoms, just like glucose. A friend of yours says: "Since those sugars have the same number of atoms, they should have the same name." You answer: "While they do have the same number and type of atoms,
A. they are named differently because they have different secondary structure." B. they are named differently because they cannot be converted into glucose." C. they are named differently because one is found in RNA and the other in DNA." D. they are named differently because they are isomers of the monosaccharide, glucose." E. they are all polysaccharides and have slightly different functions within organisms and therefore have different names."