Which of the following is the standard resource for identifying bacteria?
A) Systema Naturae
B) Bergey's Manual of Determinative Bacteriology
C) Woese and Fox's phylogenetic tree
D) Haeckel's General Morphology of Organisms
Ans: B) Bergey's Manual of Determinative Bacteriology
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Which of the following questions is about gene regulation? Select all correct choices
A. Why do all eukaryotes share a common genetic code? B. Where are genes for hemoglobin expressed? C. How much insulin is produced after a meal?
Answer the following statements true (T) or false (F)
1. Arginine vasotocin is found in nonmammalian vertebrates and shares structural and functional properties with antidiuretic hormone and oxytocin. Because of this, it is generally thought that arginine vasotocin was the ancestoral posterior pituitary hormone in vertebrates. 2. Vitamin D is a hormone produced in part by exposure to sunlight. 3. If blood sodium levels rise sharply above normal limits the heart will release more atrial natriuretic peptide. 4. Juvenile hormone is a critical growth regulatory and maturity hormone in people. 5. A growth-hormone releasing hormone tumor in the brain could lead to stunted growth in children.
The extraembryonic membrane that contains fluid to cushion and protect the embryo is the __________
Fill in the blank(s) with the appropriate word(s)
Many plants wind up with a Na+ concentration that is considerably lower than that of the surrounding soil. What plays a key role in allowing for such a difference to exist?
a. endodermis b. tonoplast c. aquaporin d. water potential