The type of place where a species typically lives is called its _____
a. niche c. community
b. habitat d. population
D
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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.
A dish of cells is treated with centrinone, a centriole inhibitor. These cells would no longer be able to ________.
A. make ATP B. synthesize proteins C. divide D. conduct photosynthesis E. produce lysosomes
Which structure in the leaf controls the opening and closing of the stroma?
a) spongy mesophyll b) guard cells c) epidermis d) cuticle
Treponema, Borrelia, and Leptospira are all
A. spirochetes. B. obligate parasites requiring host cells. C. transmitted by arthropod vectors. D. bacteria without cell walls. E. curved rods.