The zone of soil around roots of plants is called the ________.
A. rhizosphere
B. biosphere
C. ionosphere
D. hydrosphere
E. lithosphere
Answer: A
Biology & Microbiology
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All microorganisms require
A) carbon, iron, and sodium. B) phosphorus, aluminum, and sodium. C) calcium, potassium, and magnesium. D) phosphorus, selenium, and sulfur.
Biology & Microbiology
The ____ gland(s) secrete(s) thyroid stimulating hormone (TRH)
a. thyroid b. parathyroid c. thymus d. hypothalamus e. anterior pituitary
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To promote ecotourism, Costa Rica adopted a novel PSA program. What does PSA stand for?
A. Public Service Announcement B. Public Services Assessment C. Payment for Environmental Services - Pago por Servicios Ambientales D. Protection for Area Services E. Ecological Services for People
Biology & Microbiology
The upper chamber on each side of the heart is the ventricle.
a. true b. false
Biology & Microbiology